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Grumbacher Copal Painting Medium

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A traditional 19th century painting medium prepared especially for hobbyists and decorative painters (i.e. tole painters), Grumbacher Copal Painting Medium is made with a modern synthetic copal resin, and has all of the manipulative and drying characteristics of the original 19th century preparation.

When added to oil colors, Copal Painting Medium improves flow, accelerates drying, and imparts hardness and a high gloss to the dry paint film. Because this product may cause yellowing and darkening of the colors with time, its use is recommended for occasional or impermanent painting only.

Dilute Copal Painting Medium with Pure Gum Spirits of Turpentine or Grumtine only.

see also ...

Grumbacher Oil Painting Mediums

® Grumbacher is a registered trademark of Chartpak.™ Grumtine is a trademark.

Copal Painting Medium, 2.5 oz

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Grumbacher Copal Painting Medium

5.0

(based on 2 reviews)

Reviewed by 2 customers

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6/18/2017

5.0

Best oil paint medium for teachers

By S. Pohlman

from Marion, Indiana

Comments about Grumbacher Copal Painting Medium:

I ONLY use Grumbacher Copal Medium for myself and for teaching basic oil painting. I has the perfect drying timing. It leaves a very nice sheen or gloss when dry. It dries between my weekly classes enough that the student can work over the previous application and not get into any wetness. If used abundantly, water or sky or any large, moist appearing area manipulates perfectly. I save every ounce that is left in the oil cup as it uses well at all times...clean or slightly soiled. It is the best. I order it as Hobby Lobby, where I have two of my classes does not carry it. I have requested it locally. I also teach at the Senior Center. I have nothing but praise for this product.