Stabilization of free-radical photosensitive materials

A recording process including image stabilization comprising the steps of:

• 1. image-wise exposing to ultraviolet radiation and/or visible light a photosensitive recording material, which comprises at least one supported or self-supporting layer containing at least one photosensitive organic polyhalogen compound producing free radicals upon exposure to ultraviolet radiation and/or visible light, a dye precursor in said layer or in a layer adjacent thereto, which by the action of said free radicals forms a dye in the said layer or in a layer adjacent thereto, and a thermally activatable stabilizing substance within the scope of the following general formula:
• ##STR18## wherein:
• X represents
• 1. an aryl group,
• 2. the group --OR.sup.1 in which R.sup.1 is an aryl group,
• 3. the group --CH.dbd.CH--R.sup.2 in which R.sup.2 is an aryl group, or
• 4. the group ##STR19## in which R.sup.3 stands for hydrogen, an alkyl group, a cycloalkyl group or an aryl group and in which R.sup.4 stands for an alkyl group, a cycloalkyl group or an aryl group, or R.sup.3 and R.sup.4 together represent the necessary atoms to close a 5- or 6-membered saturated nitrogen-containing heterocyclic ring, and
• Y represents the group ##STR20## in which R.sup.5 represents hydrogen or an alkyl group, and R.sup.6 represents an aryl group, or an acyl group, and
• 2. heating the photo-exposed material to effect conversion of non-decomposed polyhalogen compound into a non-photosensitive condition by means of said thermally activatable substance.