Oil Stick Research

"Oil sticks"contain a wax, pigment, occasionally a binder ( i.e. clay) and I add some dammar resin for wax strengthening.  I am studying , besides paraffin wax, vegetable -derived waxes such as soy and castor. These are mixed with drying oil linseed.
A 1:2:2 ( pigment: wax: oil) is a good starting point.

"Oil Pastels" contain all of the above except mineral oil is used.

The use of oil sticks/ oil pastels allows technique somewhat between painting and drawing; brushes can be used.

We develop some of out pigments via 'azo grind methodology' ( 5 minutes at 5 Deg C).