Inks and Pigments
The best distinction between inks and pigments is that ink is a colored liquid while pigments are colored particles suspended in a liquid. Areas colored by pigments usually have multiple layers of pigments and other mediums. The most important aspect of preserving pigments and inks is to identify their composition. Some techniques are not suitable for certain pigments and will do further harm.
Read more about this topic: Preservation Of Illuminated Manuscripts