The greater the pigment content of a paint the greater the resistance it has to fading, therefore the
pigment must have the following qualities:
- it must have be light-fast to a reasonable level (fade resistant to light)
- it must not be soluble in oil or in thinners like turpentine
- it must have the right pH balance, with the linseed oil or other oil into which it is ground
It is invaluable now to have high quality pigment paints such as these, as for me it is important for me to develop my personal and professional practice.