Don,
If I remember correctly, the proper linseed oil is the "boiled"(*) variety.
Raw linseed oil is just that ,raw-Untreated!
Drys very slow if at all and may remain tacky for months)
So called "boiled" linseed oil has a hardener or drying agent added to promote drying and hardening.
The drying agent may be "Japonica (drying agent and hardner) or one of the other drying agents.
(*) Not actually boiled but treated with a hardner or drying agent or both.
ViggoG
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