This is a great way to mark your fabrics! The ultimate white powder shows up great on medium and dark fabrics. The wash out pink or barely blue also shows up on darks as well as lights so it’s a good choice for a busy print that has a lot of contrast. The Blue and pink doesn’t iron off like the ultimate white but you can brush it off or wash it off depending on the fabric. Some fabrics may have to be laundered. The Pounce Pad comes with enough chalk powder to fill the pad several times, (at least 3-4). Everyone’s quilts are different so it’s difficult to say “x” amount of quilts can be marked but we can say one bag was enough to demo how to transfer the Full Line Stencils at a recent show. We used it constantly for 9 hours a day for 4 days and we still had a quarter of the bag left at the end. That’s a lot of quilt marking! Refills are also available through us too!