I coated the paper about a week in advance with:
1 teaspoon aluminum sulphate, dissolved into 8oz room temperature water
With a small sponge, I dipped the sponge in the solution then rubbed a single layer over the paper. The paper dried hanging from clothes pins dark room-style, then were pressed under books for about seven days to flatten.
YIELD: eight 15” x 18” pieces of paper, coated in mordant
For the size:
4 tablespoons methocel, dissolved in 1 gallon lukewarm water
needs to be hot water next time so the size “gels” and the polymer can do its job
This was the first page I marbled. As soon as the paper is lifted from the surface, it must be rinsed off IMMEDIATELY, because there is plenty of excess size still on the page.
As you can see here, I did not properly rinse off the size, and it pooled on the paper collected pigment.