I agree with OCquilter - "crocking" means that the fabric will bleed/spread onto itself or other fabrics in the same washing machine. I don't think I could use a fabric like that in a quilt, just not worth possibly ruining the quilt in the end after all that work.

Back in 1975 I was pregnant with my second child. I made all my maternity clothes . One day my mil looked at me and said OMG your skin is yellow!! you need to get to the doctor NOW! . Well good thing I waited a bit and finally figured out that the bright green maternity top I was wearing was rubbing off on my skin turning it yellow. Can you imagine what my doctor would have said? Now at least I know what it was called. LOL

Sounds like a crock to me...

....and how can they sell this as quilting fabric.........or for anything else for that matter....sounds like a very deceptive selling practice to me.....a way to sell and make a profit on even cheaper goods....shame on JoAnn Fabric for even selling this junk!!!!!!!! Now we have to worry not only about bleeding material but also crocking material..........

The door of my dryer is blue from jeans, at least I think that is what caused it.
Susan

I saw this fabric at a JoAnn's last Sunday.

Crocking is the transference of dye from a fabric to another surface. It happens pretty frequently in overdyed or heavily dyed fabrics like denims, cottons and silks. If you ever buy a pair of jeans and after wearing them notice that your hands are blue? That's crocking.

Maybe its a type o and means crack

No if you read previous posts it definitely is "crock" I know it has coloured my brand new £1200 machine

Thank you, everyone for your replies; it certainly helps to have a "go to" for things like this.
Much obliged!