Positive photosensitive planographic printing plates containing specific high-molecular weight compound and photosensitive ester of O- napthoquinonediazidosulfonic acid with polyhydroxybenzophenone

摘要

A positive photosensitive planographic printing plate is disclosed which has a photosensitive layer comprising in combination a specific o- naphthoquinonediazidosulfonic ester and a resin having a specific structural unit(s). Said photosensitive layer may also contain a novolak resin and/or an organic acid.