1) Invisible picture printing 2) Custom design printing 3) Appear when use a mask tool Mask security printing KingWin VDP Technique Co., Ltd. is the earliest enterprise which professional doing Variable Date Printing and Anti-counterfeit printing service in China. Application Field:Scratch-off card, Lottery, Coupon, Rechargeable card; Ticket; Hang-tag, Director mail, Anti-counterfeit printing, 2D ...