Laminate useful for the production of printing plates and relief plates

A laminate suitable for the production of printing plates and relief plates, comprising

• (a) a photosensitive layer of a mixture, soluble in water or in an aqueous solution, of
• (a.sub.1) at least one hydrophilic polymeric binder, together with
• (a.sub.2) at least one photopolymerizable ethylenically unsaturated monomer compatible therewith, and
• (a.sub.3) a photoinitiator which can be activated by actinic light,
• (b) a dimensionally stable base, and
• (c) a thin intermediate layer between layers (a) and (b), which is substantially formed from a mixture containing
• (c.sub.1) at least one polymeric binder which is compatible with the polymeric binder (a.sub.1) of the layer (a), and
• (c.sub.2) at least one photopolymerizable ethylenically unsaturated monomer, compatible with (c.sub.1), of the formula ##STR2## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 may be identical or different and each is H or C.sub.1 -C.sub.8 -alkyl, X is C.sub.2 -C.sub.7 -alkylene, a divalent aromatic C.sub.6 -C.sub.10 -hydrocarbon radical or isophoronylene, and m and n are each integers from 1 to 4 and may be identical or different, the intermediate layer being formed by applying the mixture of the base and then curing it at from 110.degree. to 220.degree. C.