Described is a production process for the preparation of an organic titanium derivative useful for the preparation of yellow inks for digital printing on ceramics, comprising the following steps: (i) mixing an organic and/or inorganic compound of titanium (IV) and a 1,3-diol of formula: ##STR00001## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently selected from H and a linear or branched C1-C6 alkyl radical, in the presence of at least an organic solvent immiscible with water and subsequent removal of reaction by-products; (ii) adding water to the reaction mixture in a H.sub.2O:Ti2 molar ratio and subsequent removal of unreacted water and reaction by-products; (iii) maturing the reaction mixture at a temperature of 180-200 C. for 16-50 hours. Also described are the titanium derivative obtainable by means of the above-reported process, an ink that contains the derivative and a method of digital printing on ceramics that uses said ink.

Described is a production process for the preparation of an organic titanium derivative useful for the preparation of yellow inks for digital printing on ceramics, comprising the following steps: (i) mixing an organic and/or inorganic compound of titanium (IV) and a 1,3-diol of formula: ##STR00001## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently selected from H and a linear or branched C1-C6 alkyl radical, in the presence of at least an organic solvent immiscible with water and subsequent removal of reaction by-products; (ii) adding water to the reaction mixture in a H.sub.2O:Ti2 molar ratio and subsequent removal of unreacted water and reaction by-products; (iii) maturing the reaction mixture at a temperature of 180-200 C. for 16-50 hours. Also described are the titanium derivative obtainable by means of the above-reported process, an ink that contains the derivative and a method of digital printing on ceramics that uses said ink.

The present invention provides a coloring solution for zirconia, which, when used on zirconia before firing of the zirconia, causes the zirconia to exhibit only a slight color difference before and after the firing and thus enables accurate prediction of the post-firing color tone of the zirconia. The present invention relates to a coloring solution for zirconia, comprising: a coloring agent (A) that is decolorized after firing of zirconia; and a metal ion solution (B), wherein, when zirconia is colored with the coloring solution and then subjected to firing, the color difference of the zirconia before and after the firing satisfies L*5.8, a*2.4, and b*4.3.

The present invention provides a coloring solution for zirconia, which, when used on zirconia before firing of the zirconia, causes the zirconia to exhibit only a slight color difference before and after the firing and thus enables accurate prediction of the post-firing color tone of the zirconia. The present invention relates to a coloring solution for zirconia, comprising: a coloring agent (A) that is decolorized after firing of zirconia; and a metal ion solution (B), wherein, when zirconia is colored with the coloring solution and then subjected to firing, the color difference of the zirconia before and after the firing satisfies L*5.8, a*2.4, and b*4.3.

This disclosure relates to an inorganic-organic metal phosphate ceramic coating from the reaction of an inorganic phosphate of the formulas (i) A.sub.m(H.sub.2PO.sub.4).sub.m.nH.sub.2O or (ii) AH.sub.3(PO.sub.4).sub.2.nH.sub.2O; where A is ammonium or an m-valent metal element; m=1, 2, or 3; and n is 0 to 25; and at least one metal oxide or hydroxide represented by the formula B.sub.2mO.sub.m or B(OH).sub.2m, where B is a 2m-valent metal; and m=1 or 1.5; thereof; and at least one polymer capable of reacting with at least the one metal oxide or hydroxide; or a first organic precursor combined with the inorganic phosphate and a second organic precursor combined with the at least one metal oxide or hydroxide, the second organic precursor configured to chemically react with the one or more first organic precursor.

This disclosure relates to an inorganic-organic metal phosphate ceramic coating from the reaction of an inorganic phosphate of the formulas (i) A.sub.m(H.sub.2PO.sub.4).sub.m.nH.sub.2O or (ii) AH.sub.3(PO.sub.4).sub.2.nH.sub.2O; where A is ammonium or an m-valent metal element; m=1, 2, or 3; and n is 0 to 25; and at least one metal oxide or hydroxide represented by the formula B.sub.2mO.sub.m or B(OH).sub.2m, where B is a 2m-valent metal; and m=1 or 1.5; thereof; and at least one polymer capable of reacting with at least the one metal oxide or hydroxide; or a first organic precursor combined with the inorganic phosphate and a second organic precursor combined with the at least one metal oxide or hydroxide, the second organic precursor configured to chemically react with the one or more first organic precursor.

MAGENTA INK COMPOSITION FOR DECORATING NON-POROUS SUBSTRATES, in particular an ink composition containing an organic solvent as a carrier which is liquid at room temperature, a gold compound soluble in the liquid medium of the ink, a binder composition with submicrometric particles of a glass frit, submicrometric particles of oxides or inorganic primary materials and additives. Said ink is intended for printing by means of injection technology on non-porous surfaces in general which are subjected to a heat treatment which allows a magenta coloration to develop which is permanent and resistant to abrasion, cleaning agents and weathering.

Described is a production process for the preparation of an organic titanium derivative useful for the preparation of yellow inks for digital printing on ceramics, comprising the following steps: (i) mixing an organic and/or inorganic compound of titanium (IV) and a 1,3-diol of formula:

##STR00001## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently selected from H and a linear or branched C1-C6 alkyl radical, in the presence of at least an organic solvent immiscible with water and subsequent removal of reaction by-products; (ii) adding water to the reaction mixture in a H.sub.2O:Ti2 molar ratio and subsequent removal of unreacted water and reaction by-products; (iii) maturing the reaction mixture at a temperature of 180-200 C. for 16-50 hours.

Also described are the titanium derivative obtainable by means of the above-reported process, an ink that contains the derivative and a method of digital printing on ceramics that uses said ink.

Described is a production process for the preparation of an organic titanium derivative useful for the preparation of yellow inks for digital printing on ceramics, comprising the following steps: (i) mixing an organic and/or inorganic compound of titanium (IV) and a 1,3-diol of formula:

##STR00001## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently selected from H and a linear or branched C1-C6 alkyl radical, in the presence of at least an organic solvent immiscible with water and subsequent removal of reaction by-products; (ii) adding water to the reaction mixture in a H.sub.2O:Ti2 molar ratio and subsequent removal of unreacted water and reaction by-products; (iii) maturing the reaction mixture at a temperature of 180-200 C. for 16-50 hours.

Also described are the titanium derivative obtainable by means of the above-reported process, an ink that contains the derivative and a method of digital printing on ceramics that uses said ink.

This disclosure relates to an inorganic-organic metal phosphate ceramic coating from the reaction of an inorganic phosphate of the formulas (i) A.sub.m(H.sub.2PO.sub.4).sub.m.Math.nH.sub.2O or (ii) AH.sub.3(PO.sub.4).sub.2.Math.nH.sub.2O; where A is ammonium or an m-valent metal element; m=1, 2, or 3; and n is 0 to 25; and at least one metal oxide or hydroxide represented by the formula B.sub.2mO.sub.m or B(OH).sub.2m, where B is a 2m-valent metal; and m=1 or 1.5; thereof; and at least one polymer capable of reacting with at least the one metal oxide or hydroxide; or a first organic precursor combined with the inorganic phosphate and a second organic precursor combined with the at least one metal oxide or hydroxide, the second organic precursor configured to chemically react with the one or more first organic precursor.