Originally Posted by
nanna-up-north
(isn't starch made from wheat flour?)
Starch is basically just a carbohydrate: so wheat, corn, rice, potatoes. Any of those things.
I wouldn't store fabric that has been starched, but I don't see an issue with using it short term for projects. (But if you don't quilt your tops for years between making them- I'd rinse them for sure.) Lots of bugs, not just rodents, like to nibble on starchy things.