Rub-on security cards

摘要: Articles in the form of multilayered cards which contain information invisibly printed between a support member and top member. By rubbing exposed surface either or member, is developed into visible can be viewed through one members, i.e., when members composed transparent material, by physical separation members. The are structured similarly to carbonless copy papers. protected from premature, unauthorized development detection due fact that thereof creates chemical change card cannot reversed.