Michael Harding Walnut Oil 250ml
Historically, walnut oil was preferred as a binder for whites. It has the reputation for yellowing slightly less than linseed, and so paler and cooler colours bound with it underwent less change in drying. The film of dry walnut-bound paint is not quite as strong as that bound with linseed, but it is stronger than that of poppyseed oil, and this permits walnut-bound paint to be overpainted in a way which would risk later cracking if poppyseed oil had been used. Walnut oil dries at a rate comparable to linseed.