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(1) the fineness of the ink
the finer the finer the ink, then the better the dispersion performance of pigment particles, compared with other ink pigments, gold and silver ink pigments are thicker, in the gravation process is easy to block the mesh on the plate roller, resulting in blocking and the transfer rate of the ink decreased. Therefore, in the deployment of gold and silver ink to try to choose a higher fine, floating good gold and silver powder, in order to help the deployment of even and get a good imprint.(2) ink gloss belt
the gloss of gold and silver ink is largely related to the size of gold or silver particles
, in general, the larger the particles, the better the gloss of
the ink; However, it is worth noting that with the increase of metal pigment particles, gold and silver ink printing suitability will also decline, transfer performance is relatively poor, prone to paste and other printing failures.(3) heat resistance
compared with pigments in other inks, gold and silver powder in gold and silver inks have the characteristics of high conductivity. The heat resistance of gold ink is poor, easy to change color in the face of heat, therefore, in the process of use should avoid the accumulation of heat below high temperature;(4) Chemical properties
Silver ink chemical properties are relatively stable, but silver ink is not acid-resistant, easy to chemical reactions with acidic substances, so that the printing of metal gloss decreased, therefore, the printing process should use neutral auxiliary materials for inking, which should be paid special attention to. The chemical properties of gold ink are not stable enough, and contact with acids, alkalis and sulphides will occur with varying degrees of chemical changes, and make its metallic luster greatly reduced, gold ink will blacken. Secondly, gold ink is also easy to react with air, water vapor and cause color changes, therefore, in the preservation of gold ink must seal the container tightly.
