翻訳と辞書 Words near each other ・ Salt Pan Cove ・ Salt Pan Creek ・ Salt pannes and pools ・ Salt Pans, Portland ・ Salt Peanuts ・ Salt Pit ・ Salt Plains National Wildlife Refuge ・ Salt Point State Marine Conservation Area ・ Salt Point State Park ・ Salt Point, Manitoba ・ Salt Point, New York ・ Salt pond ・ Salt Pond Mountain ・ Salt pork ・ Salt potatoes ・ Salt print ・ Salt pruning ・ Salt Publishing ・ Salt Rain ・ Salt Rain (novel) ・ Salt Range ・ Salt Range coal mine ・ Salt Records ・ Salt reedgrass ・ Salt Reservations ・ Salt River ・ Salt River (Arizona) ・ Salt River (California) ・ Salt River (Canada) ・ Salt River (Jamaica) Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Salt print ： ウィキペディア英語版 Salt print The salt print was the dominant paper-based photographic process for producing positive prints during the period from 1839 through approximately 1860. The salted paper technique was created in the mid-1830s by English scientist and inventor Henry Fox Talbot. He made what he called "sensitive paper" for "photogenic drawing" by wetting a sheet of writing paper with a weak solution of ordinary table salt (sodium chloride), blotting and drying it, then brushing one side with a strong solution of silver nitrate. This produced a tenacious coating of silver chloride in an especially light-sensitive chemical condition. The paper darkened where it was exposed to light. When the darkening was judged to be sufficient, the exposure was ended and the result was stabilized by applying a ''strong'' solution of salt, which altered the chemical balance and made the paper only slightly sensitive to additional exposure. In 1839, washing with a solution of sodium thiosulfate ("hypo") was found to be the most effective way to make the results truly light-fast. The salt print process is often confused with Talbot's slightly later calotype or "talbotype" process, in part because it was normally used when making prints from calotype paper negatives. Calotype paper employed silver iodide instead of silver chloride, but the most important difference is that it was a ''developing out'' process, not a ''printing out'' process like the salt print, meaning that a much shorter exposure was used to produce an invisible latent image which was then chemically developed to visibility. This made calotype paper far more practical for use in a camera. Salted paper typically required at least an hour of exposure in the camera to yield a negative showing much more than objects silhouetted against the sky.〔("Calotype and other early paper processes" ). Earlyphotography.co.uk. Retrieved 2015-05-29.〕 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Salt print」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.