what binder to use
Use the table to work out which binder to use. If you are using a new pigment, try making a small quantity of test pastels first. If the binder is too strong they will be too hard. To avoid wasting the materials, grind them up in a pestle and mortar, add the same quantity of pigment and mix with water. Conversely, if they are too soft, grind them and mix them with binder.
|Base (chalk, kaolin etc)||Medium|
|Whites (titanium, zinc)||Medium|
|Cadmiums (red, yellow)||Medium|
|Oxide of chromium||Medium|