Fasten a sheet of the salted paper to a flat board, and with a soft wide brush apply the solution, brushing first one way of the paper and then the other. Brush very lightly so as not to roughen the paper. The solution must be applied by gas or lamp light, and the paper dried in the dark. When dry it is ready for printing. The prints should be deeper than those made on aristo-paper. Tone in any good combined bath. The following formula may be used; and is also suitable for any mat-surface paper: Dissolve 1 oz. of hypo in 6 oz. of water, and filter. Dissolve 7-1/2 grains of pure trichloride of gold in 1 oz. of water. Add this gold solution drop by drop to the hypo solution, shaking the mixture frequently during the operation. This is a stock solution. To prepare the toning bath take 1-1/2 oz. of this stock solution and mix it with 7-1/2 oz. of a ten-per-cent. solution of hypo. (A ten-per-cent. solution is made by dissolving 1 oz. of hypo in 9 oz. of water.)
Place the prints in this bath without previous washing, and tone to the desired color. Almost any tone from reddish-brown to black may be obtained, the tone depending on the length of the time the print is left in the toning bath. Wash well and pin on a flat board, and set the board in an upright position till the prints are dry. The paper is of sufficient weight not to require mounting, and the paper should be cut large enough to leave a wide margin all round the print. For a 4 by 5 picture cut the paper 8 by 10 inches. In printing, the paper--except where the picture is to appear--should be covered. Take a piece of opaque paper the size of the sensitized sheet, and cut an opening in the centre a little smaller than the negative from which the print is to be made, and print the picture through this opening.
Another way to shield the paper from the light is to cut a square of paper the size desired for the finished print. Paste this lightly in the centre of a sheet of plain glass, and paint all the clear glass with Strauss's marl or Gihon's opaque. When the paste is dry remove the paper, and print through the clear glass in the centre.
Pictures made on Whatman's paper are not common, as few amateurs know how to make them, but the process is very easy. The paper can be sensitized with any of the solutions used for making tinted prints, directions for which have recently been given. A collection of fine prints made on Whatman's paper, using papers of different tints, is always much admired, and well repays one for the extra labor required to prepare the paper.