If you are the follower of the old school, here is the old recipe for the medium for imprimatura layer in 7 layers technique:
1 part Dammar Varnish
20 part Turpentine
Oil Painting Medium Recipes
Best Oil Painting Mediums Recipe
If you are the follower of the old school, here is the old recipe for the medium for imprimatura layer in 7 layers technique:
1 part Dammar Varnish
20 part Turpentine