During the twentieth century, two world wars and new forms of transportation propelled the area into a much faster pace of technological developments. The advancement of the internal combustion engine created a new need for petroleum feed stocks. Not only was petroleum a useful energy source, it simply proved to be the main source of many organic chemical feed stocks for the industry. The pigment industry is no exception.
Many of the colors were discovered unintentionally while scientists were seeking to create other chemical products. Colorants such as pthalo blues and greens, the quinacridone reds and violets, the arylide yellows, and aniline colors. Many of these colors show various levels of transparency, have vivid or intense colors, and high tinting energy. What this suggests is the skill to be added to a paint binder in a far lower attention. Of coarse, organic pigments are commonly hydrophobic and more challenging to disperse.
They primarily require higher amounts of wetting and dispersing agents to get them into water based coatings. Another useful way to paint paint mediums and resins is using pigment in liquid form. The commons form is universal tints. A typical tint is termed that because they’re able to be utilized in essentially any finish or medium as a colorant. They typically encompass a very finely ground solid pigment, a surfactant, emulsifiers like glycols, and water.
These mixtures are ground in pigments dispersion equipment until a smooth even color mix is received. Typically, these tints are used at 5% concentration to paint medium or less. For deep colors, up to 10% is used. Using 15% or higher awareness would affect the drying and curing characteristics of the paint finish or resin.