Curing indicator printing coating

A process for printing onto a moving substrate having an image-receiving surface, the process comprising:

• providing a radiation receptive layer at least partially covering the image-receiving surface, the radiation receptive layer comprising a coating composition having an amine value of 6-90 mg KOH and comprising:
• from 40-97 wt. % of reactive compound (M) containing at least one free radically polymerizable double bond,
• from 2.5-20 wt. % of radical photoinitiator (R),
• amine compound (D) containing at least one amino group and
• non-photobleaching colored dye (C) which is able to react with free radicals under bleaching of its color,
• wherein the wt. % is relative to the total weight of the composition, (M) is different from (R);
• (R) is different from (D);
• and (C) is different from (R) and (M);
• and
• the radical photoinitiator (R) contains species having a property of interacting with amino groups to generate free radicals when exposed to electromagnetic radiation,
• moving the image-receiving surface parallel to the radiation receptive layer according to a printing speed, and
• treating the radiation receptive layer by electromagnetic radiation.

An intermediate industrial print product produced by a process for printing onto a moving substrate having an image-receiving surface, the process comprising:

• providing a radiation receptive layer at least partially covering the image-receiving surface, the radiation receptive layer comprising a coating composition having an amine value of 6-90 mg KOH and comprising:
• from 40-97 wt. % of reactive compound (M) containing at least one free radically polymerizable double bond,
• from 2.5-20 wt. % of radical photoinitiator (R),
• amine compound (D) containing at least one amino group and
• non-photobleaching colored dye (C) which is able to react with free radicals under bleaching of its color,
• wherein the wt. % is relative to the total weight of the composition,
• (M) is different from (R);
• (R) is different from (D);
• and (C) is different from (R) and (M);
• and
• the radical photoinitiator (R) contains species having a property of interacting with amino groups to generate free radicals when exposed to electromagnetic radiation,
• moving the image-receiving surface parallel to the radiation receptive layer according to a printing speed, and
• treating the radiation receptive layer by electromagnetic radiation.