Scrim is fine mesh or web of (usually) poly that stabilizes the batting and allows you to quilt cotton batting further apart without fibers migrating and creating lumps in th batting with washing and use. The scrim also prevents the dreaded pokies that happen when the machine needle pushes part of the batting through the backing fabric. Scrim side usually goes against the backing fabric to stop the pokies.
Last edited by Krisb; 08-27-2016 at 02:28 PM.