Water developable screen printing composition

This invention relates to a composition for use in a screen printing screen. More particularly, this invention relates to a screen printing composition comprising (a) a binder resin having the general formula -A-B-C- wherein a plurality of each of components A, B and C occur in ordered or random sequence in the resin and wherein A is present in said resin at about 5% to about 20% by weight and comprises groups of the formula B is present in said resin at about 4% to about 30% by weight and comprises groups of the formula and C is present in said resin at about 50% to about 91% by weight and comprises acetal groups consisting of groups of the formulae (I) (II) (III) wherein said group I is present in component C from about 75% to about 85%; group II is present in component C from about 3% to about 5%; and group III is present in component C from about 10% to about 22%; and wherein R is hydrogen or lower alkyl; and (b) a mixture of (1) a polyethoxylate diacrylated monomer; and (2) an oligomeric amine diacrylate; and (c) a photoinitiator.