Application Features of Gold and Silver Spot Color Printing
Application Features of Gold and Silver Spot Color Printing
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In order to achieve more expressive design effects, designers and packaging printers often need some spot color printing processes in the packaging printing process. The most common gold and silver printing.
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Gold and silver inks are simply called gold or silver. They are metallic inks, which are characterized by noble elegance, saturated colors, and a wide range of applications. There are two main types of gold and silver inks: pigments (colors) and binders (adjusting oils).
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The pigment in gold ink is commonly referred to as "gold powder", which is actually a scaly powder made of copper and zinc alloy in a certain proportion. If the copper content in the gold powder is above 85%, the gold ink is reddish and is commonly called red gold; If the zinc content is between 20% and 30%, the gold ink color is greenish, and it is generally called blue gold; the one between red gold and blue gold is called blue red gold.
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The pigment of silver ink is aluminum powder, which is composed of 65% scaly aluminum powder and 35% volatile hydrocarbon solvents. The proportion of aluminum powder pigment is relatively small, and it is easy to float in liquid. The bonding material used is a special kind of ink. Generally called gold or silver oil, the main ingredients are oil, resin, organic solvent auxiliary materials and so on.
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Due to the unique metallic luster of gold and silver ink, it has been occupying an important position in the printing industry for many years. Gold and silver ink printing have also been continuously innovated in technology. The richness and grandeur of gold have added joy and gorgeousness to printed matter. The atmosphere of elegance. Silver's elegant elegance has also been sought after by more designers and businesses. Commonly there are full version of gold or silver, partial gold-silver combination, and gold and silver as the background overprinting four colors. Used in picture books, gift packaging, tea boxes, greeting cards, business cards, hardcover books, wall calendars, desk calendars, etc.
In the printing process, the printing of gold and silver is actually difficult to control the quality of the finished product. First, because the particles of gold ink and silver ink are thicker than the pigment particles of other inks, the paper and gold. The slight oxidation of the conjunctival reaction affects the ink adhesion. Pigment particles are easily precipitated from the binder during the drying process, resulting in inadequate adhesion. If other colors of ink are imprinted on gold or silver ink, due to its own properties The reason is that it is easy to stick the bottom ink away, and the printing is not true or appears white.
What needs to be added is that there is a difference between gold and silver printing and bronzing. Gold printing only requires a single set of film, indicating the spot color, and the spot color channel can be printed normally. Bronzing requires not only a single set of film, but also a hot stamping plate. We won't go into details.
