Here is an excerpt from the General rules for swapping activities on this board.
"5. When an activity includes swapping fabrics, they should be washed, dried and ironed and cut as precisely as your skills allow. Oranizers should not require they be starched or otherwise treated unless it's essential to success in the type of project involved. Those of us who don't normally prewash should make exceptions when joining in group activities. It's a courtesy to others who may have allergies or other health needs requiring smoke and animal free environments/supplies."
If a swap host/hostess wishes to "differ", they can...but as a general rule...this is what we all agree to follow when we join a swap on this board. Just FYI....the entire section is posted at the top of the "Swaps section" and is also linked to on page 1 of this thread where Kris referenced the general swap rules.