Positive image-forming method using 4-methyl-1-pentene polymer

摘要

A positive image-forming material consisting of a methylpentene homopolymer or a methylpentene copolymer containing 50 mole percent or more of methylpentene units which has an intrinsic viscosity of not less than 0.2 dl/g as measured in decalin at 135 DEG C. and being soluble in not more than 100 times by weight of cyclohexene at 25 DEG C.