| abstract |
PURPOSE:To form a positive type pattern enabling the manufacture of the black matrix of a color picture tube by a simple method, by using a novel water-soluble positive type photosensitive composition. CONSTITUTION:A substrate is coated with a water-soluble photosensitive composition consisting of a water-soluble aromatic diazonium salt, water-soluble phenol, a water-soluble high-molecular compound and a deliquescent inorg. salt such as zinc chloride, magnesium chloride, calcium chloride, lithium chloride, zinc bromide, magnesium bromide or lithium bromide as a binder. The resulting film is exposed to chemical radiation through a prescribed pattern. Powder is brought into contact with the exposed film, and an alkaline gas or liq. is further brought into contact with the film to develop the film. |