Pigment carbon black is used as carbon black for coloring pigments in inks, paints, coatings, plastics and other products. According to the coloring strength (or blackness) and particle size, it is generally divided into four types: high pigment carbon black, medium pigment carbon black, ordinary pigment carbon black and low pigment carbon black. It is mainly produced by oil furnace method and tank method. So what is the application of pigment carbon black in ink, let's take a look.
There are four main functions of pigment carbon black in ink:
One is to provide higher gloss and tinting strength;
The second is the lower cost of mixing and grinding;
The third is to assist in improving the performance of lithography;
The last point, which has received widespread attention at present, is that there is no problem of dust or associated environment.
Finished inks are produced from base products where carbon black pigments are mixed into oleoresins. Since the carbon is dispersed in the resin, it can be fully wetted before it is used to make ink or used in the printing process. A certain curing time allows the carbon black particles to be wetted and to produce better printing inks. The wetting time is a fixed amount. Due to the small particle size of carbon black, generally around 25nm, it is the smallest of all pigments used in ink manufacturing. Because of its small size, the formed pigment clusters have a relatively large surface area, and the wetting time will be longer than that of large particle pigments.
The development trend with respect to carbon black dispersion is actually not as dramatic as it first appeared. Ink manufacturers have taken a progressive approach to using wash colorants instead of dry milled pigments as a starting point for making red, yellow, and blue inks. At present, ink manufacturers prefer to choose dry grinding carbon black, after all, the cost of purchasing dry carbon black and resin raw materials mixed with it is not high.
However, when considering the cost of the lower process, pumping and filtering to heat-set the ink, and reasonable re-roll milling for tablet packaging, it is quite apparent that the cost of the actual finished ink is either high or low.
In most cases, the ink will be used reasonably, but to some extent it will achieve the best characteristics, which is also an obvious defect for printing use effect. By applying pre-dispersed carbon black, ink manufacturers can compare with other It is easier and faster to obtain high-quality black ink with dry carbon black as raw material. At the same time, it will avoid the unique dust problem of mixing in the processing technology. If the equipment is to obtain highly concentrated carbon black, it needs very large power equipment. This needs attention. However, strong concentration is stipulated by general printing inks, which can make the product have high strength and good gloss. Other improvements to printing include coordinated ink and water balance in the printing process.