initially non-diffusible in alkaline environment

Full Title

Diffusion transfer processes or agents therefor; Photosensitive materials for such processes > Photosensitive materials characterised by the image-forming section > the substances transferred by diffusion consisting of organic compounds (G03C8/04 takes precedence) > of dyes or their precursors > characterised by the releasing mechanism > Oxidation of the chromogenic substances > initially non-diffusible in alkaline environment