Method for desensitization of a color developer

A method for desenitization of a color developer sheet which comprises preparing a photocurable composition including a photocurable compound, coating the photocurable composition on a color developer sheet, and then irradiating the coated surface with light to cure the photocurable compound prior to color formation thereby reducing or destroying the function of the color developer to form a color by reaction with a color former.

A method for desensitization of a color developer sheet which comprises printing a photocurable composition containing a photocurable compound on selected areas of the surface of said sheet on which said color developer is present, and then irradiating the coated surface with light to cure the photocurable compound prior to color formation thereby desensitizing the ability of the color developer to form a color on reaction with a color former in those selected areas printed.

A method for desensitization of selected areas of a color developer used in a pressure sensitive copying paper assembly including a layer of a color former and a layer of a color developer which causes a reaction to occur upon contact of said color former with said color developer which comprises coating a photocurable composition containing a photocurable compound on selected areas such that said layer of color former and said layer of color developer are separated by said photocurable composition and then irradiating the coated photocurable composition with light to cure the photocurable compound prior to color formation and thereby form a film between said layer of color developer and said layer of color former.