Important: Safety Warning
This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
This information has been left in for historical purposes but should not be acted upon.
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Soap Marble for Books
This is applicable for marbling stationery, book tained from any dealer in photographic maedges, or sheets of paper for ladies' fancy terials. It is sold in sheets about 18 by 22 work.
Grind, on a marble slab, Prussian inches. The smooth side can be easily selectblue , with water, and a little brown soap, to ed, and upon that side the print should be a fine pliable consistence, that it may be made. Cut the paper into the sizes most thrown on with a small brush. Grind King's convenient for the style of picture desired, yellow in the same manner, with water and and prepare the salting solution as follows: white soap.
When green is intended for 3131. Salting Solution for Photothe ground color, grind it with brown soap, graphic Paper. Mix together pure water, and King's yellow with white soap. Lake 16 ounces; chloride of ammonium or of may be used for a ground color, and Prussian sodium, 160 grains. Take enough of this to blue ground with white soap; brown umber cover a shallow dish of porcelain to the depth for a ground color, and flake-white ground of inch or more, and then immerse the with white soap. Any color of a light sub- paper, one sheet at a time. When a half stance may be ground for marbling. dozen are in, turn them all over, and take them out one by one, in the order in which the work and ascertain when the print is they were immersed, and hang them up sufficiently exposed to the action of the light. separately to dry.
The exposure should continue until the image 3132. Albumenized Paper for Pho- is much darker than intended when finished, tography. Albumenized paper, such as is as the after processes of toning and fixing used for ordinary portraiture in the galleries, reduce or bleach the pictures very considerais always ready prepared for silvering. It is bly. As the prints are taken out of the frame, much the finest and sharpest in its results, put them away in the dark again, until ready and will usually be adopted; but the most for the toning bath. artistic effects will be produced by the use of plain papier saxe. Paper, in either of these forms, prepared with chloride (salt) will keep indefinitely. 3133. Silver Solution to Sensatize Paper. The weather being propitious for printing (a clear, bright sunlight is preferable), the salted or albumenized paper is taken into a darkened room to be rendered sensitive by the silver solution. Make about the same quantity of this as of the salting solution, by using, in the following proportions: Pure wator, 1 ounce; nitrate of silver (in crystals), 60 grains. When thoroughly dissolved, pour the solution into a flat porcelain dish, and carefully remove all bubbles, &c.