Modern printing processes : gum bichromate and platinotype papers (1900)
Abbott, Henry G., 1858-1905 · Chicago : Geo. K. Hazlitt · leaf 36
MODERN PRINTING PROCESSES. 32 run away in the water. If you use a mask in printing you will find that the pigment that lay under the mask shows a tendency to soften and run away. If, on the other hand, there appears to be no ten- dency to soften, then turn the print face down again and allow it to… … Developing the Print. turn it face up and again examine. If it shows any signs of softening at the edges place it on a piece of zinc or plate glass, hold it in position by means of a clip and gently bathe it with the cold water by pouring it from a graduate or other vessel. Do not pour the water…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from St. Nicholas [serial] (1873)](https://img.insideoutlibrary.com/img/200/ia-stnicholasserial4911dodg-939-1054.webp)
