An inkjet ink includes: (i) a disazo dye of formula (I): ##STR00001##
(ii) 1,3-propanediol; (iii) a glycol compound selected from the group consisting of: triethylene glycol and tetraethylene glycol; and (iv) water. The ink has low toxicity and is preferably absent ethylene glycol and sulfolane.

There is provided a reaction liquid to be attached to a recording medium to which an ink composition is to be attached, the reaction liquid including an aggregating agent which aggregates components of the ink composition, water, and a surfactant, in which a content of the surfactant is 2% by mass or more and 10% by mass or less with respect to a total mass of the reaction liquid.

There is provided a reaction liquid to be attached to a recording medium to which an ink composition is to be attached, the reaction liquid including an aggregating agent which aggregates components of the ink composition, water, and a surfactant, in which a content of the surfactant is 2% by mass or more and 10% by mass or less with respect to a total mass of the reaction liquid.

The present disclosure relates to compositions comprising quaternary metal chalcogenide nanoparticles stabilized by an inorganic metal-chalcogenide stabilizing agent, wherein the nanoparticles are dispersible in a polar solvent. More particularly, the disclosure relates to compositions of CZTS nanoparticles. This disclosure provides processes for manufacturing these compositions. The disclosure also provides coated substrates, thin films and devices comprising the compositions, and processes for manufacturing the same.

The present disclosure relates to compositions comprising quaternary metal chalcogenide nanoparticles stabilized by an inorganic metal-chalcogenide stabilizing agent, wherein the nanoparticles are dispersible in a polar solvent. More particularly, the disclosure relates to compositions of CZTS nanoparticles. This disclosure provides processes for manufacturing these compositions. The disclosure also provides coated substrates, thin films and devices comprising the compositions, and processes for manufacturing the same.

The present invention relates to a medical wristband with invisible information and a method for manufacturing the same. The conventional developed dyes or inks in the prior art can store information which, however, is visible. In the present invention, polystyrene (PS) microspheres are prepared by micro-emulsification: PS particles are dissolved in a toluene solution and a fluorescent dye is added to obtain a fluorescent solution; an SDS solution is added in and mixed with the fluorescent solution to obtain a system to be ultrasonically emulsified; and the system is ultrasonically emulsified and the toluene is completely volatilized. The ink can be used directly as an invisible ink. The information is written, as two-dimensional codes and by the ink, on a piece of non-fluorescent paper, and plastic-packaged onto a wristband of a patient. Information about a patient can be successfully scanned in the ease of UV on.

Provided is a recording method including: a first applying step of applying anionic first processing liquid on a medium; a second applying step of applying cationic second processing liquid on the medium, causing the first processing liquid and the second processing liquid to react with each other, and generating mixed liquid, subsequently to the first applying step; and a first drying step of drying the mixed liquid subsequently to the second applying step, in which the mixed liquid is cationic.

A coalescing agent for three-dimensional (3D) printing includes a co-solvent, a surfactant having a hydrophilic lipophilic balance (HLB) value that is less than 10, a carbon black pigment, a polymeric dispersant, and a balance of water. The co-solvent is present in an amount ranging from about 15 wt % to about 30 wt % of a total wt % of the coalescing agent. The surfactant is present in an amount ranging from about 0.5 wt % to about 1.4 wt % of the total wt % of the coalescing agent. The carbon black pigment is present in an amount ranging from about 3.0 wt % to about 6.0 wt % of the total wt % of the coalescing agent. The polymeric dispersant has a weight average molecular weight ranging from about 12,000 to about 20,000.

A coalescing agent for three-dimensional (3D) printing includes a co-solvent, a surfactant having a hydrophilic lipophilic balance (HLB) value that is less than 10, a carbon black pigment, a polymeric dispersant, and a balance of water. The co-solvent is present in an amount ranging from about 15 wt % to about 30 wt % of a total wt % of the coalescing agent. The surfactant is present in an amount ranging from about 0.5 wt % to about 1.4 wt % of the total wt % of the coalescing agent. The carbon black pigment is present in an amount ranging from about 3.0 wt % to about 6.0 wt % of the total wt % of the coalescing agent. The polymeric dispersant has a weight average molecular weight ranging from about 12,000 to about 20,000.

A printing system for printing a security feature in the form of a latent image comprising at least three compositions (RI), (C1) and (C2): (RI) a reactive ink comprising a silane compound (A) comprising at least a first and a second polymerizable moiety which are different from each other and are polymerizable by different mechanisms, loaded in a first reservoir of a first printhead, (C1) a first catalyst composition comprising a substance able to react with the silane compound (A) of composition (RI) and promote the polymerization of the first polymerizable moiety, loaded in a second reservoir of said first printhead or of a second printhead, (C2) a second catalyst composition comprising a substance able to react, alone or in presence of composition (C1), with the silane compound (A) of composition (RI) and promote the polymerization of the second polymerizable moiety.