Patent ID: 6017657
Filing Date: 2000-01-25
Classification: B21B,B21H,B44B,B44C,B44F,C25D,G03H,Y10S

Abstract:
A method for preparing an aluminum article having an embossed hologram thereon, comprising:preparing a surface-relief holographic master by exposing a photo resist layer to an interfering light pattern and developing;electroforming a layer of metal onto the holographic master to prepare a negative master;removing the negative master from the holographic master and electroforming metal onto the negative master surface to form a positive reproduction of the negative master;forming an embossing shim by then electroforming nickel in a hardening bath of composition and under conditions effective to produce a layer of nickel of enhanced hardness and durability; andpressing the embossing shim against the surface of an unheated aluminum can or can stock substrate to transfer thereto the intended hologram.