Blank Green Linen pantograph, 24# Appleton DocuCheck Basic Safety Laser Check Stock. The laser check is in the middle with voucher stubs above and below. This laser check stock has "TonerFuse" which causes the ink to be infused into the parer making it almost impossible to be tampered with. Packaged - 250 poly wrap protected. Check has 11 security features built into the paper. These includes Thermochromic ink (Heat Sensitive) on the check face - Heat will fade the RED key image. And, Coin Reactive Ink in the back - Key will appear underneath Coin Image in the endorsement area when rubbed with a coin.