Someone on the board is selling fabric storage boards. Another member asked if they were fabric safe and acid-free.

I have never heard any talk anywhere about problems with fabric storage similar to photo storage.

What is the opinion on this in the quilting forum world?

They should be acid-free. Acid in paper can leave marks on or eat through fabric just as it does with other papers.

Go to a comic book store. They have boards, acid free, for storing the collector comic books. A pack of 100 is about $10.00. They work great and come in several sizes,

Clotilde sells a fancy version of the exact same thing. If they weren't safe I'm sure Clotilde wouldn't sell them.