This is a very simple mixture, but this DIY gesso can make a big difference when you’re making a paper mache sculpture.
Home-Made Gesso Recipe:
- “Some” Elmer’s Glue-All (PVA glue)
- “Some” Drywall Joint Compound (if you’re not sure what that is, watch this video to see how it’s used in home remodeling projects.) Use any joint compound except Dap brand, which doesn’t work. Walmart sells non-Dap joint compound in their paint department.
That’s right — there’s no specific amount of either ingredient in this “recipe.” In fact, I just pour some glue and plop some joint compound into a bowl and start mixing. If you use more glue and make it runnier, the gesso will tend to self-level and make a nice smooth surface on your sculpture. If you use more joint compound and make it thicker, you can use an old brush or sharp tool and create fur and other interesting textures. If you apply the gesso too thickly, it may crack as it dries – but you can fix that with a bit more gesso, or by using a damp sponge to smooth things over.
You can add a dab of white acrylic paint if you want the gesso to be more opaque, to cover the printing on newspaper, for instance.
Also, you can sand the gesso if you want the surface of your sculpture to be really smooth, but if you do sand it, be sure to wear a mask. The dust is really fine, and it contains silica, which you don’t want in your lungs. I never sand, just because I don’t like the dust flying around the house. I prefer to use a lightly damp sponge and “wet sand,” instead. If a kitchen sponge doesn’t seem to be working, you can use one of those sanding sponges that you buy in the hardware store. Since I’m not that serious about getting anything perfectly smooth, the kitchen sponge works just fine for me.
This mixture can also be used as paste with blue shop towels. The gesso is a variation of the fast-setting paste that I use for my masks. I used the gesso mixture as paste with shop towels for the first time when I made the green witch mask for Halloween, and I was quite impressed with it. However, the gesso is so heavy, I don’t think it would work well as paste with lighter papers, like newspaper. (Haven’t tried it, though, so I could be wrong).
By the way, several years ago I tried making paper mache clay using the DAP brand joint compound, and it turned into little balls of rubber. I tried it again with the gesso recipe, and it didn’t work for that, either. Use any brand of drywall joint compound except DAP.
Note: Drywall joint compound is created for the construction industry and is not edible! Do not use this gesso if you’re working with small children who may put the gesso or the joint compound in their mouths, or if you’re making a toy for a baby. It’s also important to wear a mask if you sand your paper mache after it dries, because the calcium carbonate in the joint compound is mined in areas that also contain silica, and fine silica dust is not good for your lungs.
Powdered Marble Gesso recipe:
For a thicker home-made gesso, you can use calcium carbonate (powdered marble) and white glue. The traditional proportions are 2 parts PVA glue (Elmer’s or an archival book-binder’s PVA glue if you worry about pH), 4 parts water, and 8 parts calcium carbonate. To make it nice and white, add 1 part powdered titanium or zinc white pigment. If you want to thicken the gesso to cover bumps faster, you can use more powdered marble. This mixture dries very hard, but sands easily. This recipe uses materials that are not readily available, and they can be rather expensive, but this was the first gesso recipe I used, and it does work really well. You can see someone making this gesso here.