Photographic paper that creates a positive image from a negative through printing and development. There are contact printing papers with slow-sensitive silver chloride emulsions (gaslight paper), enlargement printing papers with fast-sensitive silver bromide emulsions (bromide paper), and enlargement printing papers with intermediate sensitivity between the two, with color printing papers also being widely used today. Albumen paper from the early days of photography, POP, and Aristo Platinum Paper are printing papers (→print-out printing papers) in which gelatin or collodion emulsion is applied to the base paper. In recent years, both sides of the support paper are increasingly coated with polyethylene. This type of printing paper has the advantage that it does not absorb water, so washing and drying times are short and development can be done quickly. With the spread of digital cameras, the number of types of printing paper is decreasing, as is the case with photographic film. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
陰画から焼き付け,現像処理を経て陽画をつくる写真感光紙。感度の遅い塩化銀乳剤の密着用印画紙(ガスライト紙),感度の速い臭化銀乳剤の引き伸ばし用印画紙(ブロマイド紙),両者の中間的感度を有する塩臭化銀乳剤の引き伸ばし用印画紙(クロロブロマイド紙)があり,今日ではカラー印画紙も広く普及している。写真術初期の鶏卵紙をはじめ,POP,アリスト白金紙はゼラチンまたはコロジオン乳剤を原紙に塗布した焼き付け印画紙(→焼出し印画紙)である。近年は,支持体である紙の両面をポリエチレンで被膜したものが多くなりつつある。このタイプの印画紙は支持体の紙の吸水がないので,水洗時間,乾燥時間が短くてすみ,迅速な現像処理ができるという利点がある。デジタルカメラの普及により,写真フィルムと同様に印画紙の種類も減少している。
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