How to increase ink brightness in letterpress printing?
At present, some economically less developed areas are still using this technology of elimination. It is worth pointing out that although the former printing technology has been basically eliminated, the flexo printing technology, which belongs to the convex printing field in essence, has developed rapidly in recent years, and has become one of the most dynamic printing methods.
The printing ink used in letterpress printing presses is called relief printing ink. One of the earliest known technologies of printing, characterized by the printing of the printed part of the printed text, the ink and the printing plate convex contact, and directly transfer the text to the primer.
The first impression inks were made from inorganic pigments and dry oils. Later, inorganic, organic pigments and resin based binders were used as the main raw materials. The earliest printing plate made of wood or stone, then the type for a long period of time, the print has become synonymous with relief printing. At present, the traditional way for letterpress printing ink letterpress printing in almost no market, this is mainly because the ink for offset printing can meet the embossing requirements, so people generally use the offset printing ink used in letterpress printing, however, due to the development of flexible printing market, making flexible printing ink production gradually increased.
