Protect your current comics with these pre-made kits with boards pre-loaded into bags. Just drop a comic in, close the flap and you're done. The BCW Comic Backer Boards are made from a full 24 point solid bleached sulfate, coated on one side with a buffered 3% calcium carbonate and are precision cut to size. The BCW Comic Bags are an acid free, archival quality product made of crystal clear polypropylene. Bags are 2 mils thick and have a 1 1/2 inch flap for closure. Sold in packs for 50 premades.