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Descrição do livro

The Tannin Process by C. Russell is a practical manual on dry-plate photography, presenting a dry collodion method that seeks to improve sensitiveness, uniformity, and durability over moist processes. Russell critiques existing moist preservative methods for insensitiveness and dust issues, then describes a drying process using gelatine or tannin coatings to enhance adhesion and image quality. The text covers extensive instructions for cleaning plates, grinding edges, preparing and applying gelatine or tannin coatings, and drying techniques. It explains formulation of collodion with iodine and bromide to boost sensitiveness, discusses baths of nitrate of silver and acidity, and outlines precise steps for coating, exciting, washing, and developing plates, including the use of tannin as an accelerator in development and strategies to adjust contrast with acids. The book also discusses printing transparencies, comparisons with other dry processes (gelatine, metagelatine, collodio-albumen, Fothergill), and practical considerations for avoiding fog and stains. It is a seminal reference for 19th-century photographic technique.

Número de páginas :85
Encadernação The Tannin Process (English Edition):Kindle
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