Originally Posted by purplemem
The cardboards are NOT acid free. The cardboard will eventually leech onto fabric and discolor it. They use these at fabric stores because they have a good turnaround for fabric.
Fabric boards ARE acid free, and thinner. They will hold more fabric in less space.
Quilt shops use them all the time and even though they may turn the product around quickly, I'm betting it would take many a year for there to be a problem. I've had a few for at least 5 years and had no problem. Ever.