Q: I wish to use Casein or Casein Silverpoint on wood panel for bole/gilding application and egg tempera painting of icons. Which is the better product for this application?
A: While most gilders prefer a traditional chalk ground made from chalk and rabbit skin glue, the Silverpoint Ground would be better suited as a substrate for bole, since it dries harder and is more absorbent.
Q: How is casein gesso better than casein paint (such as Shiva titanium white), when preparing a ground for silverpoint (on paper)? Thank you.
A: Shiva Casein Paint does not dry to permanent finish, whereas our Casein Gessoes do.
This ground also contains Zinc White, which allows for the tarnish marks that are left when a silverpoint comes in contact with the surface. Shiva Titanium White does not contain Zinc White.
Q: Can you provide composition and material safety data sheet?
A: Yes, we do have an SDS sheet for this product and we will forward a copy to you today.
Q: Should I prime birch wood panels before applying the ground?
A: There is no need to prime the panels, but they should be sealed with a layer of shellac or PVA, in order to prevent uneven moisture absorption on the rest of the panel.
I'd like to order Casein Absorbent Chalk Gesso and I just wanted to make sure if it's safe to ship this product in winter due to freeze/thaw conditions.
And the second question is whether you recommend to size the wood panel with Gac 200 or any other sizing medium.
A: All of our Casein products are not affected by freezing temperatures. We always recommend sealing any type of panel, before applying the ground.
Q: Is this gesso suitable for non-porous surfaces such as polyester or metal, will it be prone to cracking off?
A: In our experience the ground works on metal, but you may want to test your particular application, before using the gesso on a larger scale.