Original formula Grumtine is a strong, effective, finest quality oil painting medium and solvent for cleaning brushes with the pleasant fragrance of natural orange rind. More effective than turpentine as a thinner and in the preparation of mediums. Add directly to colors or mediums for thinning. Soak brushes well to remove color.
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Is it necessary to add linseed oil to Grumbacher Grumtine in order to use it for oil painting?- Asked by Zohar on 31-Mar-13
Grumtine acts as a thinner and a medium. You do not need to add linseed oil to it.- Answered by MisterArt on 01-Apr-13
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