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
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