Platinum toning : including directions for the production of the sensitive paper
Platinum toning is an 1892 London manual by Lyonel Clark, published by Hazell, Watson, & Viney, explaining how to make platinotype sensitive paper and tone prints with platinum. The pictures here are small line engravings of photographic apparatus, such as a folding plate camera, lenses and a view finder, drawn in crisp hatched black and white. A designer might take from them a clean, technical vocabulary of Victorian optical equipment shown in cutaway and three-quarter views.
