I make my paints using techniques which date back to the days of the old Masters. There is a straightforward reason for this steady process. As an artist and a painter, I want to create colours that are true and vibrant as well as beautiful and durable.
The higher the pigment content of an Oil Paint, the greater the resistance it has to fading. Nearly all manufacturers use fillers to extend the volume of the oil paint. It may increase profit, but it compromises the quality.
I refuse to use fillers. Why make something exceptional only to dilute it?