Allen Debevoise. - In the Photo-American.

The essential parts of a photographic print are often wanted in preparing advertisements and other matter partly in type, and though I cannot draw very well I am making all needed sketches by an old process that answers very well and is quickly done. Sometimes we print on such rough paper that half tone engravings such as are used in many magazines, would not show detail at all, but be a mere blotch of black, and then we have recourse to line work if at no other time. Tell you how 'tis done? With pleasure. I buy sheets of salted and sized paper (Clemons) at the stock house. I mix the following sensitizing solution, and as it keeps well, ten ounces will do no harm; so into ten ounces of distilled water I drop one ounce of silver nitrate and half an ounce of ammonium nitrate, the whole bath, bottle, water and chemicals costing me sixty cents.

With a tuft of cotton fastened to a glass tube by drawing a loop over the cotton and through the tube I make a good brush. I don't want to get any of it on my fingers for it will turn them black as night, hence I use the Buckles brush, as this cotton and tube is called.

Now, pinning a sheet of paper to a soft pine board I daub about a quarter of an ounce of the sensitizer all over it with the brush, being careful to cover the paper evenly by first stroking down and afterwards going over the whole job crosswise. I do this in a weak light way back from any windows, and when coated, I just hang the 18x22 sheet up and fan it a few minutes till bone dry. Now I have a lot of paper and I cut it up and put it in a tin box where it will keep a few days without discoloring, if a lump of calcium chloride, done up in cotton in a perforated tin pill box, is also placed in the box.

Print this paper as you would aristo. Mark the back of the sheet with crosses in lead pencil before sensitizing, for one can't tell the sensitized side from the other after dry. The print being made,

I merely fix it in hypo, wash and dry it, and then trace out the parts I want with a pen charged with Higgins' water-proof ink. Follow all important lines closely, but ignore the rest merely suggesting rather than drawing any detail by hatching or wriggles (I don't know any other name for that stroke), being careful not to block up any part to a dead black. This being completed, and it usually takes me four or five minutes only, the print goes into a bleaching bath made of 10 ounces of water, 100 grains of bichloride of mercury and a good pinch of salt. I never weigh or measure this bath, any strength will do. In this bath all traces of the silver image fade away, leaving nothing but my drawing, and presto! 'tis done. Wash a few moments, dry, add a touch here and there that was forgotten, and the line drawing or sketch is ready to use. The engraver makes me a block of it to print as an illustration to my advertisement or other text, but those who do not want blocks can copy the sketch with the camera and develop the plate to great density and then reproduce as many of the sketches as fancy dictates.

If the negative is printed on CC platinotype it will be hard to say what it is, for it cannot be told from a pen and ink drawing. Much amusement and a good knowledge of drawing can readily be had by enjoying this simple process for a change, and the results ought to please. The sensitizer can be kept in any light; it don't spoil it to be in the light; in fact a frequent sunning does it good. If one wishes to tone the prints on this paper some very beautiful effects can be had with a simple bath of gold just neutralized with chalk and a grain of soda bicarbonate, demons' formula (to be had at the stock house selling his paper) for the toning bath also gives the best of black or purple black tones. There's a whole lot of fun in this thing, it's cheap and - well what more need be asked?