Acyloxy substituted acrylate timing layers for color diffusion transfer

A material for a color diffusion transfer photographic process, which comprises a support and which possesses neutralizing means thereon comprising the combination of a timing layer containing a polymer having a repeating unit represented by the following general formula (I):

• ##STR10## where R.sub.1 represents a hydrogen atom or a methyl group, R.sub.2 represents a hydrogen atom, an aliphatic hydrocarbon residue having 1 to 6 carbon atoms or an aryl group, and X represents an n+l valent aliphatic hydrocarbon residue having 2 to 8 carbon atoms or an n+l valent residue of the formula --A--O.sub.m A, wherein A represents an aliphatic hydrocarbon residue having 2 to 4 carbon atoms, and m and n each represents an integer of 1 to 5, and an acidic polymer layer between said support and said timing layer.