Solvent Dyes are brilliant metal complex dyes with good solubility in cello solve and in many other solvents. Solvent Dyes are particularly suitable for the production of transparent and lightfast shades in general coating and printing inks.
Solution of Solvent Dyes behave like colloidal systems. The solubility values are only a guide, reached under specific conditions.
The solubility & fastness to certain chemicals and food-stuffs is shown in the charts.
The heat resistance of a dye depends to a great extent on the nature of the medium and on the length of time it is heated. If the medium itself turns yellow, the lacquer colour will change even through the dye itself is fairly stable: the effect is most noticeable in the case of blue dyes, which may appear markedly greener.
The light fastness of a shade depends not only on the dye used but also on the nature of the vehicle. The concentration of the dye also has an influence.
Solvent Dyes are suitable for use in transparent lacquers, flexographic and gravure printing inks and wood stains; and for colouring anodized aluminum and plastics such as cellulose nitrate, cellulose acetate and polyester resins.
The coloration of nitrocellulose lacquers for producing transparent shades on metalized polyester film & metal foil constitutes an important field of application for Solvent Dyes. These dyes are by nature suitable for a variety of applications in many others binder systems such as vinyl resins, alkyd melamine baking enamels, shellac resins and acrylic resins.