I have a few project ideas, and I thought of reusing the paper from various shop catalogs that I receive in my physical mailbox. I’d like to make it stiffer, something more like cardboard. I read somewhere online that you could use corn starch for this, mixed with water. Would it work? Do you have better ideas?
Often don’t need corn starch, but depends on makeup of the paper & what you want for the end use, leave to dry. Can add glues for other effects.
Tear up pieces, soak in water, squeeze out excess water, shape as needed. Adjust size of torn pieces for different structural effects, from slurry you can pipe for definition & brittle strength or compression through to large overlaid sheets for sheering strength & flexibility)