Printing process for transferring a printing substance

Abstract

The present invention relates to a printing method for transferring printing substance from an ink carrier to a substrate, in which the printing substance undergoes a change in volume and/or position with the aid of an energy-emitting device that emits energy during a process time in the form of electromagnetic waves wherein the printing substance comprises a high molecular weight binder. In addition, the present invention describes a printing substance for carrying out the method and the use thereof.

Claims

1. A printing method for the transfer of a printing substance from an ink carrier to a substrate, the method comprising: emitting energy from an energy-emitting device, and changing a volume and/or position of the printing substance using energy emitted from an energy-emitting device, wherein the energy comprises electromagnetic waves, wherein the printing substance comprises a high molecular weight binder having a weight average molecular weight of 100,000-10,000,000 q/mol measured by means of GPC, and a distance between the printing substance and the substrate is 50 μm to 450 μm.

2. The printing method according to claim 1, wherein the energy is transferred from the electromagnetic wave into the printing substance using absorption bodies.

3. The printing method according to claim 1, wherein the printing substance comprises 0.01-5 wt.-% of the high molecular weight binder.

4. The printing method according to claim 1, wherein the printing substance has a ratio of loss modulus (G2) to storage modulus (G1) [tan (delta)=G2/ G1] ranging from 0.05 to 1.3.

5. The printing method according claim 1, wherein the printing substance comprises absorption bodies, the absorption bodies comprising carbon black or at least one inorganic pigment.

6. The printing substance for carrying out the printing process according to claim 1, the printing substance further comprising: at least one low molecular weight binder, and at least one functional carrier.

7. The printing substance according to claim 6, wherein the at least one functional carrier is selected from the group consisting of inorganic pigments, glass fluxes, and metal particles.

8. The printing substance according to claim 7, wherein the metal particles comprise silver particles.

9. The printing substance according to claim 6, wherein the printing substance has a viscosity of 400-4500 mPas measured at 20° C. at a shear rate of 2 s.sup.−1, measured with a plate/cone.

10. The printing substance according to claim 9, wherein the viscosity of the printing substance is within the range of 1000-2000 mPas, when measured at 20° C. and a shear of 2 s.sup.−1 with plate/cone.

11. The printing substance according to claim 9, wherein the viscosity of the printing substance is within the range of 500-1000 mPas, when measured at 20° C. and a shear of 200 s.sup.−1 with plate/cone.

12. The printing substance according to claim 9, wherein the viscosity of the printing substance is within the range of 400-800 mPas, when measured at 20° C. and a shear of 600 s.sup.−1 with plate/cone.

13. The printing substance according to claim 6, wherein the printing substance comprises at least one propellant with a boiling point ranging from 60° C. to 250° C.

14. The printing substance according to claim 6, wherein a weight average molecular weight (Mw) of the at least one low molecular weight binder ranges from 10,000 to 150,000 g/mol, when measured according to GPC.

15. The printing substance according to claim 6, wherein the surface tension of the printing substance is 26-34 mN/m.

16. The printing substance according to claim 6, wherein the at least one functional carrier comprises particles with a d50 of 0.5-30 μm.

17. The printing substance according to claim 6, wherein a solid content of the printing substance is at least 30% by weight.

18. The printing method according to claim 1, wherein the substrate is selected from the group consisting of glass, ceramic, metal, wood and plastic; and the printing substance further comprises: at least one low molecular weight binder, and at least one functional carrier.

19. The printing method according to claim 1, further comprising: applying the printing substance to the substrate, wherein the substrate is selected from the group consisting of glass, ceramic, metal, wood and plastic.

20. The printing method according to claim 19, further comprising: curing the printing substance on the substrate, wherein a curing temperature ranges from 150° C. to 1200° C.

Description

(1) The present invention may be better understood, and its numerous objects, features and advantages made apparent to those skilled in the art by referencing the accompanying drawings.

(2) FIG. 1A is a photograph at 100 times magnification of an example paste baked on a substrate in accordance with the present subject matter.

(3) FIG. 1B is a photograph of the example paste of FIG. 1A at 30 times magnification.

(4) FIG. 10 is a photograph at 100 times magnification of a comparative example paste baked on substrate in accordance with the present subject matter.

(5) FIG. 1D is a photograph of the comparative paste of FIG. 10 at 30 times magnification.

(6) FIG. 2A is a photograph at 100 times magnification of another example paste baked on a substrate in accordance with the present subject matter.

(7) FIG. 2B is a photograph of the example paste of FIG. 2A at 30 times magnification.

(8) FIG. 2C is a photograph at 100 times magnification of another comparative example paste baked on substrate in accordance with the present subject matter.

(9) FIG. 2D is a photograph of the comparative paste of FIG. 2C at 30 times magnification.

(10) FIG. 3 is an enlarged photograph of another example paste cured on a substrate in accordance with the present subject matter.

(11) The present invention is explained in more detail below using examples, such examples not limiting the invention.

INVENTIVE EMBODIMENT EXAMPLE 1

(12) A color paste from Ferro GmbH based on the glass color powder 14305 and the medium C7 (both Ferro GmbH) is adjusted to a viscosity of 960 mPas with Dowanol DPM and a hydroxylpropyl cellulose with a molecular weight of 850,000 g/mol, measured at 20° C. and a shear rate of 200/sec, the concentration of this active substance being about 0.09% by weight.

(13) The color paste is transferred to glass plates (format 100×100×4 mm) using the printing process described above and baked at 690° C. The photos shown in FIG. 1 show a detail with 100 or 30 times magnification. The printed substrate shows only very little satellite formation, as can be seen from FIGS. 1A (100 times magnification) and 1B (30 times magnification), represent the light microscope images of the decoration.

COMPARATIVE EXAMPLE 1

(14) Inventive Embodiment Example 1 is essentially repeated, but no hydroxypropyl cellulose with a molecular weight of 850,000 g/mol is used, the viscosity likewise being in the range of approximately 960 mPas.

(15) The color paste is transferred to glass plates (format 100×100×4 mm) using the printing process described above and baked at 690° C. The photos show a section enlarged 100 or 30 times. The printed substrate now shows a very clear satellite formation, as can be seen from FIGS. 1C (100 times magnification) and 1D (30 times magnification).

INVENTIVE EMBODIMENT EXAMPLE 2

(16) An ink based on the inorganic components of the silver paste TSP2002 from Ferro GmbH is adjusted to a viscosity of 487 mPas with Dowanol DPM and a hydroxylpropyl cellulose with a molecular weight of 850,000 g/mol, measured at 20° C. and a shear rate of 200/sec, the The concentration of this active substance is about 0.13% by weight.

(17) The ink is transferred to glass plates (format 100×100×4 mm) by means of the printing process described above and baked at 690° C. The printed substrate shows only very little satellite formation, this being evident from FIGS. 2A (100 times magnification) and 2B (30 times magnification), which represent light microscopic images of the decoration.

COMPARATIVE EXAMPLE 2

(18) Inventive Embodiment Example 2 is essentially repeated, but no hydroxypropyl cellulose with a molecular weight of 850,000 g/mol is used, the viscosity likewise being in the range of approximately 480 mPas.

(19) The color paste is transferred to glass plates (format 100×100×4 mm) using the printing process described above and baked at 690° C. The photos show a section enlarged 100 or 30 times. The printed substrate now shows a very clear satellite formation, as can be seen from FIGS. 2C (100 times magnification) and 2D (30 times magnification).

INVENTIVE EMBODIMENT EXAMPLE 3

(20) A color paste from Ferro GmbH based on the glass color powder 14297 and the medium C7 (both Ferro GmbH) is adjusted with Dowanol DPM and a hydroxylpropyl cellulose with a molecular weight of 850,000 g/mol to a viscosity of approx Shear rate of 200/sec, the concentration of this active substance being about 0.09% by weight.

(21) The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 5 minutes (20° C.). The storage modulus G1 is about 25.0 Pa after 8 minutes (plateau phase), the loss modulus G2 about 13.9 and tan (delta) G2/G1 about 0.56. After about 12.5 minutes the storage modulus G1 is about 25.1 Pa, the loss modulus G2 about 14.5 Pa and tan (delta) G2/G1 about 0.58.

(22) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only very little satellite formation.

INVENTIVE EMBODIMENT EXAMPLE 4

(23) A color paste from Ferro GmbH based on the glass color powder 144012 and the medium 801016 (both Ferro GmbH) is adjusted to a viscosity of about 860 mPas with Dowanol DPM and a hydroxylpropyl cellulose with a molecular weight of 370,000 g/mol, measured at 20° C. Shear rate of 200/sec, the concentration of this active substance being about 0.29% by weight.

(24) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only very little satellite formation.

INVENTIVE EMBODIMENT EXAMPLE 5

(25) A color paste from Ferro GmbH based on the glass color powder 14510 and the medium C7 (both Ferro GmbH) is adjusted to a viscosity of 860 mPas with Dowanol DPM and a hydroxylpropyl cellulose with a molecular weight of 850,000 g/mol, measured at 20° C. and a shear rate of 200/sec, the concentration of this active substance being about 0.09% by weight.

(26) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only very little satellite formation.

INVENTIVE EMBODIMENT EXAMPLE 6

(27) A color paste from Ferro GmbH based on the glass color powder 14297 and the medium C7 (both Ferro GmbH) is adjusted to a viscosity of 625 mPas with a solution of an n-BUMA/MMA copolymer with a molecular weight of 250000 g/mol in glycol ether, measured at 20° C. and a shear rate of 200/sec, the concentration of this active substance being about 1.25% by weight.

(28) The viscosity properties are determined by a step test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 5 minutes (20° C.). The storage modulus G1 is about 57.0 Pa after 8 minutes (plateau phase), the loss modulus G2 about 31.7 and tan (delta) G2/G1 about 0.56. After about 13 minutes the storage modulus G1 is about 44.6 Pa, the loss modulus G2 about 29.7 Pa and tan (delta) G2/G1 about 0.67.

(29) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only a very slight satellite formation, this being evident from FIG. 3, which shows enlarged sections from a photo of the decoration.

INVENTIVE EMBODIMENT EXAMPLE 7

(30) An ink based on the inorganic components of the silver paste TSP2042 from Ferro GmbH is adjusted to a viscosity of 400 mPas with Dowanol DPM and a hydroxylpropyl cellulose with a molecular weight of 850,000 g/mol, the concentration of this active substance being about 0.18% by weight.

(31) The ink is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only very little satellite formation.

INVENTIVE EMBODIMENT EXAMPLE 8

(32) A color paste from Ferro GmbH based on the glass color powder 14297 and a medium based on glycol ether containing about 2.25% low molecular weight binder with approx set about 750 mPas, measured at 20° C. and a shear rate of 200/sec, the concentration of the high molecular weight active substance being about 0.09% by weight.

(33) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only a very slight satellite formation like embodiment 1.

INVENTIVE EMBODIMENT EXAMPLE 9

(34) A color paste from Ferro GmbH based on the glass color powder 14297 and the medium C7 (both Ferro GmbH) is adjusted to a viscosity of 800 mPas with Dowanol DPM and a hydroxylpropyl cellulose with a molecular weight of 370,000 g/mol, measured at 20° C. and a shear rate of 200/sec, the concentration of this active substance being about 0.17% by weight.

(35) The viscosity properties are determined by a step test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 5 minutes (20° C.). The storage modulus G1 is after 8 minutes (Plateau phase) about 21.6 Pa, the loss modulus G2 about 12.5 and tan (delta) G2/G1 about 0.58. After about 12 minutes the storage modulus G1 is about 22.6 Pa, the loss modulus G2 about 13.6 Pa and tan (delta) G2/G1 about 0.60.

(36) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only very little satellite formation.

COMPARATIVE EXAMPLE 3

(37) Inventive Embodiment Example 9 is essentially repeated, but no hydroxylpropyl cellulose with a molecular weight of 370,000 g/mol is used, the viscosity likewise being in the range of about 800 mPas.

INVENTIVE EMBODIMENT EXAMPLE 10

(38) 100 parts by weight of a color paste from Ferro GmbH based on the glass color powder 14315 and the medium C7 (both Ferro GmbH) is mixed with Dowanol DPM (9.9 parts by weight) and 6.5 parts by weight of a solution of a hydroxypropyl cellulose with a molecular weight of 370,000 g/mol in DPM (7.2 parts by weight of polymer in 200 parts by weight of DPM) adjusted to a viscosity of about 1000 mPas, measured at 20° C. and a shear rate of 200/sec, the concentration of this active substance being about 0.20% by weight Minutes, the oscillation is interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillated again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 1.8. The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only very little satellite formation.

INVENTIVE EMBODIMENT EXAMPLE 11

(39) 100 parts by weight of a color paste from Ferro GmbH based on the glass color powder 14315 and the medium C7 (both Ferro GmbH) is mixed with Dowanol DPM (12.2 parts by weight) and 6.5 parts by weight of a solution of a hydroxypropyl cellulose with a molecular weight of 850,000 g/mol in DPM (3.6 parts by weight of polymer in 200 parts by weight of DPM) adjusted to a viscosity of about 590 mPas, measured at 20° C. and a shear rate of 200/sec, the concentration of this active substance being about 0.1% by weight. The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillation again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 2.2. The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only very little satellite formation.

INVENTIVE EMBODIMENT EXAMPLE 12

(40) 100 parts by weight of a color paste from Ferro GmbH based on the glass color powder 14315 and the medium C7 (both Ferro GmbH) is mixed with Dowanol DPM (9.4 parts by weight) and 6.5 parts by weight of a solution of a hydroxylpropyl cellulose with a molecular weight of 850,000 g/mol in DPM (3.6 parts by weight of polymer in 200 parts by weight of DPM) adjusted to a viscosity of about 1020 mPas, measured at 20° C. and a shear rate of 200/sec, the concentration of this active substance being about 0.1% by weight.

(41) The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 2.0.

(42) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only very little satellite formation.

COMPARATIVE EXAMPLE 4

(43) Inventive Embodiment Example 10 is essentially repeated, but no hydroxylpropyl cellulose with a molecular weight of 370,000 g/mol is used, but the viscosity is only adjusted by adding DPM, the viscosity also being in the range of about 1090 mPas. The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 3.7. The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate now shows a very clear satellite formation.

COMPARATIVE EXAMPLE 5

(44) Inventive Embodiment Example 11 is essentially repeated, but no hydroxylpropyl cellulose with a molecular weight of 850,000 g/mol is used, but the viscosity is merely adjusted by adding DPM, the viscosity likewise being in the range of about 660 mPas. The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes and the oscillation interrupted for about 15 seconds with a shear rotation of 100 s.sup.−1 and then oscillated again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 4.5. The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate now shows a very clear satellite formation.

INVENTIVE EMBODIMENT EXAMPLE 13

(45) 100 parts by weight of a color paste from Ferro GmbH based on the glass color powder 14316 and the medium C7 (both Ferro GmbH) is mixed with Dowanol DPM (8, 1 parts by weight) and 8 parts by weight of a solution of a hydroxylpropyl cellulose with a molecular weight of 370,000 g/mol in DPM (7.2 parts by weight of polymer in 200 parts by weight of DPM) Set viscosity of about 990 mPas, measured at 20° C. and a shear rate of 200/sec, the concentration of this active substance being about 0.25% by weight.

(46) The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 1.9.

(47) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only very little satellite formation.

INVENTIVE EMBODIMENT EXAMPLE 14

(48) 100 parts by weight of a color paste from Ferro GmbH based on the Glass color powder 14316 and the medium C7 (both Ferro GmbH) is mixed with Dowanol DPM (10.3 parts by weight) and 8 parts by weight of a solution of a hydroxylpropyl cellulose with a molecular weight of 850,000 g/mol in DPM (3.6 parts by weight of polymer in 200 parts by weight of DPM) to adjust the viscosity to about 600 mPas, measured at 20° C. and a shear rate of 200/sec, the concentration of this active substance being about 0.12% by weight.

(49) The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4.3 minutes is about 2.2.

(50) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only very little satellite formation.

INVENTIVE EMBODIMENT EXAMPLE 15

(51) 100 parts by weight of a color paste from Ferro GmbH based on the glass paint powder 14316 and the medium C7 (both Ferro GmbH) is mixed with Dowanol DPM (7.5 parts by weight) and 8 parts by weight of a solution of a hydroxypropyl cellulose with a molecular weight of 850,000 g/mol in DPM (3.6 parts by weight of polymer in 200 parts by weight of DPM) to adjust the viscosity to about 1080 mPas, measured at 20° C. and a shear rate of 200/sec, the concentration of this active substance being about 0.12% by weight.

(52) The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 2.1.

(53) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only very little satellite formation.

COMPARATIVE EXAMPLE 6

(54) Inventive Embodiment Example 13 is essentially repeated, but no hydroxypropyl cellulose with a molecular weight of 370,000 g/mol is used, but rather the viscosity is only adjusted by adding DPM, the viscosity also being in the range of about 1100 mPas.

(55) The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes and the oscillation interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillated again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 4.0.

(56) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate now shows a very clear satellite formation.

COMPARATIVE EXAMPLE 7

(57) Inventive Embodiment Example 14 is essentially repeated, but no hydroxylpropyl cellulose with a molecular weight of 850,000 g/mol is used, but the viscosity is only adjusted by adding DPM, the viscosity also being in the range of about 500 mPas.

(58) The viscosity properties are determined by a jump test, with oscillation initially taking place for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 4 minutes (20° C.) tan (delta) G2/G1 after about 4 minutes is about 5.1.

(59) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate now shows a very clear satellite formation.

INVENTIVE EMBODIMENT EXAMPLE 16

(60) 100 parts by weight of a color paste from Ferro GmbH based on the glass color powder 14501 and the medium C7 (both Ferro GmbH) is mixed with Dowanol DPM (9.5 parts by weight) and 8 parts by weight of a solution of a hydroxylpropyl cellulose with a molecular weight of 370,000 g/mol in DPM (7.2 parts by weight of polymer in 200 parts by weight of DPM) Set viscosity of about 1010 mPas, measured at 20° C. and a shear rate of 200/sec, the concentration of this active substance being about 0.24% by weight.

(61) The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 1.9. The color paste is transferred to a substrate using the printing process described above and cured. The printed substrate shows only very little satellite formation.

INVENTIVE EMBODIMENT EXAMPLE 17

(62) 100 parts by weight of a color paste from Ferro GmbH based on the glass paint powder 14501 and the medium C7 (both Ferro GmbH) is mixed with Dowanol DPM (12, 1 parts by weight) and 8 parts by weight of a solution of a hydroxylpropyl cellulose with a molecular weight of 370,000 g/mol in DPM (7.2 parts by weight of polymer in 200 parts by weight of DPM) to adjust the viscosity to about 640 mPas, measured at 20° C. and a shear rate of 200/sec, the concentration of this active substance being about 0.24% by weight.

(63) The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 1.5.

(64) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only very little satellite formation.

INVENTIVE EMBODIMENT EXAMPLE 18

(65) 100 parts by weight of a color paste from Ferro GmbH based on the glass color powder 14501 and the medium C7 (both Ferro GmbH) is mixed with Dowanol DPM (12.5 parts by weight) and 8 parts by weight of a solution of a hydroxylpropyl cellulose with a molecular weight of 850,000 g/mol in DPM (3.6 parts by weight of polymer in 200 parts by weight of DPM) to adjust the viscosity to about 540 mPas, measured at 20° C. and a shear rate of 200/sec, the concentration of this active substance being about 0.12% by weight.

(66) The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 0.4.

(67) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only very little satellite formation.

INVENTIVE EMBODIMENT EXAMPLE 19

(68) 100 parts by weight of a color paste from Ferro GmbH based on the glass color powder 14501 and the medium C7 (both Ferro GmbH) is mixed with Dowanol DPM (9.4 parts by weight) and 8 parts by weight of a solution of a hydroxylpropyl cellulose with a molecular weight of 850,000 g/mol in DPM (3.6 parts by weight of polymer in 200 parts by weight of DPM) to adjust the viscosity to about 1040 mPas measured at 20° C. and a shear rate of 200/sec, the concentration of this active substance being about 0.12% by weight.

(69) The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 2.2.

(70) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only very little satellite formation.

COMPARATIVE EXAMPLE 8

(71) Inventive Embodiment Example 18 is essentially repeated, but no hydroxypropyl cellulose with a molecular weight of 850,000 g/mol is used, but rather the viscosity is only adjusted by adding DPM, the viscosity likewise being in the range of about 480 mPas.

(72) The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 5.9.

(73) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate now shows a very clear satellite formation.

COMPARATIVE EXAMPLE 9

(74) Inventive Embodiment Example 19 is essentially repeated, but no hydroxypropyl cellulose with a molecular weight of 850,000 g/mol is used, but the viscosity is merely adjusted by adding DPM, the viscosity likewise being in the range of about 1060 mPas.

(75) The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 5.6.

(76) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate now shows a very clear satellite formation.

INVENTIVE EMBODIMENT EXAMPLE 20

(77) 100 parts by weight of color paste from Ferro GmbH based on the glass color powder 14510 and the medium C7 (both Ferro GmbH) is mixed with Dowanol DPM (10.0 parts by weight) and 5 parts by weight of a solution of a hydroxylpropyl cellulose with a molecular weight of 370,000 g/mol in DPM (7.2 parts by weight of polymer in 200 parts by weight of DPM) to adjust the viscosity to about 1010 mPas, measured at 20° C. and a shear rate of 200/sec, the concentration of this active substance being about 0.16% by weight.

(78) The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 1.9.

(79) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only very little satellite formation.

INVENTIVE EMBODIMENT EXAMPLE 21

(80) 100 parts by weight of a color paste from Ferro GmbH based on the glass color powder 14510 and the medium C7 (both Ferro GmbH) is mixed with Dowanol DPM (12.8 parts by weight) and 5 parts by weight of a solution of a hydroxylpropyl cellulose with a molecular weight of 370,000 g/mol in DPM (7.2 parts by weight of polymer in 200 parts by weight of DPM) to adjust the viscosity to about 580 mPas, measured at 20° C. and a shear rate of 200/sec, the concentration of this active substance being about 0.15% by weight.

(81) The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 2.0.

(82) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only very little satellite formation.

INVENTIVE EMBODIMENT EXAMPLE 22

(83) 100 parts by weight of a color paste from Ferro GmbH based on the glass color powder 14510 and the medium C7 (both Ferro GmbH) is mixed with Dowanol DPM (12.5 parts by weight) and 5 parts by weight of a solution of a hydroxylpropyl cellulose with a molecular weight of 850,000 g/mol in DPM (3.6 parts by weight of polymer in 200 parts by weight of DPM) to adjust the viscosity to about 600 mPas, measured at 20° C. and a shear rate of 200/sec, the concentration of this active substance being about 0.08% by weight.

(84) The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 1.5.

(85) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only very little satellite formation.

INVENTIVE EMBODIMENT EXAMPLE 23

(86) 100 parts by weight of a color paste from Ferro GmbH based on the glass color powder 14510 and the medium C7 (both Ferro GmbH) is mixed with Dowanol DPM (10.0 parts by weight) and 5 parts by weight of a solution of a hydroxylpropyl cellulose with a molecular weight of 850,000 g/mol in DPM (3.6 parts by weight of polymer in 200 parts by weight of DPM) to adjust the viscosity to about 970 mPas, measured at 20° C. and a shear rate of 200/sec, the concentration of this active substance being about 0.08% by weight.

(87) The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 2.1.

(88) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate shows only very little satellite formation.

COMPARATIVE EXAMPLE 10

(89) Inventive Embodiment Example 22 is essentially repeated, but no hydroxypropyl cellulose with a molecular weight of 850,000 g/mol is used, but rather the viscosity is only adjusted by adding DPM, the viscosity likewise being in the range of about 530 mPas.

(90) The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 6.2.

(91) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate now shows a very clear satellite formation.

COMPARATIVE EXAMPLE 11

(92) The embodiment 23 is essentially repeated, but no hydroxylpropyl cellulose with a molecular weight of 850,000 g/mol is used, but the viscosity is only adjusted by adding DPM, the viscosity also being in the range of about 970 mPas.

(93) The viscosity properties are determined by a jump test, with oscillation initially for about 9 minutes, the oscillation being interrupted for about 15 seconds by a shear rotation at 100 s.sup.−1 and then oscillating again for about 4 minutes (20° C.). The tan (delta) G2/G1 after about 4 minutes is about 4.0.

(94) The color paste is transferred to a substrate by means of the printing process described above and cured. The printed substrate now shows a very clear satellite formation.

INVENTIVE EMBODIMENT EXAMPLE 24

(95) 100 parts by weight of a color paste from Ferro GmbH based on the Glass paint powder 14510 and the medium C7 (both Ferro GmbH) is mixed with Dowanol DPM (10.0 parts by weight) and 5 parts by weight of a solution of a hydroxylethyl cellulose with a molecular weight of 420,000 g/mol in DPM (7 parts by weight of polymer in 100 parts by weight of DPM) to a viscosity of set about 1000 mPas, measured at 20° C. and a shear rate of 200/sec.

(96) The examples show that the objects set out above can be achieved by the present invention, in particular the formation of satellites can surprisingly be significantly reduced without adversely affecting other properties of the printing substance.