(Photo) thermographic material with a blue background

A thermographic recording process comprising the steps of:

• (a) bringing a substantially light-insensitive thermographic recording material comprising a substantially colourless support and a thermosensitive element, said thermosensitive element containing a substantially light-insensitive organic silver salt, an organic reducing agent for said substantially light-insensitive organic silver salt in thermal working relationship therewith and a binder into the proximity of a heat source and
• (b) imagewise heating of said substantially light-insensitive thermographic recording material with said heat source, wherein a blue pigment or dye having an absorption maximum in the wavelength range from 550 to 700 nm is uniformly distributed in said thermosensitive element and/or uniformly distributed in a layer on either side of said support, which blue pigment or dye provides a background for viewing in transmission images produced with said substantially light-insensitive thermographic recording material, and wherein said blue pigment or dye is selected from the group consisting of phthalocyanine dyes, phthalocyanine pigments, indanthrone dyes and indanthrone pigments.