. . . "Y--R5 wherein Y is a functional group selected from the group consisting of --OC(O)--, --C(O)O--, and --OC(O)O--: R4 is a divalent alkyl or divalent aralkyl group having 1 to 12 carbon atoms; R5 is hydrogen, or an alkyl or aralkyl group having 1 to 20 carbon atoms; and, the total number of carbon atoms in R4 plus R5 is at least 9; (b) a second substrate with a surface on which is coated a salt of" .