| abstract |
An inexpensive light-sensitive composition suited for use in print wiring or zinc relief printing, comprising a mixture of a light sensitive resin material such as polyvinyl cinnamate, polyvinyl cinnamylidene acetate or a rubber, e.g., cyclized, with an organic azide, with a ketone-formaldehyde resin such as those obtained by the condensation of formaldehyde with an aliphatic, aromatic or cycloaliphatic ketone in the presence of an alkali is disclosed. |