This is the best non-toxic solvent to use for oil painting.

A good non-toxic solvent for oil painting should effectively thin oil paints and mediums without emitting harmful fumes or compromising the integrity of the paint film. Here are some of the best options:

1. Spike Lavender Oil (Lavandula latifolia)
• A historical alternative to turpentine used by Old Masters.
• Effectively dissolves oil paints and resins while **evaporating more slowly.