Modern printing industry commonly uses inks containing metallic pigments. Some of them are in wide use apply the term "gold", as when printing an effect of the presence of the noble metal. In particular, it uses bronze pigment shades and regulated by the presence in the mixture% copper.
The current bronze manufacturing technology allows you to get the grain of the metal pigment which has the necessary conditions for the print size. For example, in offset printing it is 3.5 microns. Bronze powder (bronze powder) is a fine powder of a layered structure with a flaky (plate) shape, having a golden or copper-red hue.
Powder used as a pigment in the production of various colors. Besides printing is used in construction (inlay), in the manufacture of pencils, decoration frames and moldings.
For the production of offset printing inks used bronze powder BPO (used for offset printing). It has the following characteristics:
-content of copper (Cu) - 84-85%;
-content of iron (Fe) - 0,2-0,3%;
fat-content - 0.2-0,3%;
-residue sieve - 1,6-2,0% R0063;
- SWR - 1970-2100 g / cm2.
In an industrial scale bronze powder BPO released and transported in drums with a capacity of 60 kg. On the subsequent sale of goods packed in a darkened vacuum packaging of 100g of product.
Working with bronze powder requires caution and strict adherence to safety standards. Strongly not be exposed to the powder in the respiratory tract. Since BPO bronze powder easily scatters from the air flow, it is necessary to minimize the effects of drafts. In addition, it should be noted that the metal powder may be a source of allergic reactions, swelling and cramps.