| 摘要 |
PURPOSE:To enable image formation by both positive and negative workings by using a photosensitive composition layer contg. a quinone diazide compound and a basic carbonium dye. CONSTITUTION:A blend of a 1pt.wt. o-naphthoquinone diazide compound such as 2, 2'-dihydroxy-diphenyl-bis-[naphthoquinone-1, 2-diazide-5-sulfonic acid ester] and an about 0.005-1pt.wt. basic carbonium dye such as auramine or malachite green is coated onto a support to form a photosensitive composition layer. The resulting photosensitive material can be developed with an alkaline developer, so it is imagewise exposed and immediately developed to form an image by positive working. The material may be imagewise exposed, heated, uniformly exposed to active rays of light, and developed to form an image by negative working. |
