Solvent screen printing inks

A great variety of inks are commercially available, but they can also be made in order to attend to specific characteristics. The ink generally contains a binder agent such as glass powder, resins, cellulose acetate, or some solvents, and additives that provide the wished functional characteristics. Screen printing ink is applied to the substrate by placing the screen over the material and the ink... 

This very high-boiling glycol ester is used primarily as a solvent in printing inks and high-bake enamels, and os a coalescing aid in latex paints. The very slaw evaporation rate and the limited water solubility of this solvent are especially applicable in silk screen inks and as a component in polystyrene coatings for decals. Also it is a selective solvent in the separation of alcohols ond ketones by distillation. 

Uses Solvent, coalescing aid for latex paints solvent in cosmetics reagent textile and silk-screen printing inks slow-drying lacquers in food-pkg. adhesives... 

Commercial screen printing inks contain diverse mixtures of additives, including pigments, plasticizers, surfactants, extenders, dispersants, and waxes. Pigments are used to control color. Plasticizers are used to soften binders and improve the flexibility of the finished product. Surfactants are used to decrease the surface tension of the solvent. Extenders are used to lower cost. Dispersants are used to avoid particle coagulation, and waxes are used to improve the rub resistance and gloss of the finished product. All these additives are undesirable in electrochemistry and should be excluded from carbon inks. 

Alcohols, ketones, acetates, and hydrocarbons are used as the principal solvents in printing inks while the glycol ethers are used as tailing solvents to control evaporation rates [14]. The glycol ethers PM and DPM are effective in gravure and flexographic inks while the two acetates PMA and DPMA are useful in silk screen inks. 

The major chemicals that compose standard solvent-borne screen printing inks include screen emulsions, solvents, surfactants, caustics, and oxidizers used in screen reclamation. These inks can vary dramatically in their formulations, primarily because of the wide range of different materials screen printers are likely to print on. Printing on paper uses a different ink than printing on textiles. Ink formulations also vary for plastics, glass, ceramics, metals, and so on. 

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