There are various criteria for judging the quality of our pigments. But the most important may certainly be how our bismuth vanadate (Pigment Yellow 184) looks in a paint. How great is it’s hiding power and how does it compare to another type of pigment?
For this purpose, a small amount of pigment is thoroughly mixed and rubbed into a varnish. Depending on the desired quantity and application objective, there are various standards and matching equipment. The finished varnish is applied to a piece of cardboard and spread evenly with a thread bar. Two shades, a standard and the new product, are usually compared. However, the difference is often not visible to the naked eye and depends on the lighting conditions. Therefore, the quality parameters of both coatings (pure bismuth vanadate and a tinted draw-down with titanium dioxide) are objectively compared with camera system and computer.
