a photosensitive composition comprising a polyester formed from dicarboxylic acid units of the formula : ## str1 ## wherein 1 , m , n , p and q are independently an integer of 0 or 1 with at least one of 1 , m and n having a value of 1 , x and y are independently hydrogen or x and y are combined to form an alkylene group containing 1 - 4 carbon atoms ; and said polyester containing alkylene glycol units of the formula : -- o --( ro -- r wherein r is alkylene of 2 - 4 carbon atoms and r is an integer of 2 - 4 and said polyester also containing hydrogenated bisphenol units represented by the formula : ## str2 ## wherein r 1 and r 2 independently are hydrogen or an alkyl group of 1 - 6 carbon atoms .