. The book of photography; practical, theoretical and applied. g oven of the pattern shown by is very useful for drying quickly, butthe temperature should on no account ex-ceed that required to promote a slightlywarm current of air, actual heat beingavoided. If the paper is squeegeed toglass, it should first be thoroughlydrained. Printing and Inking-up. A printing frame of the box pattern,with strong springs, should be used to board (Fig. 892) is of great assistance forholding the paper steady during theoperation. Developing the Transfer A rather deep zinc tray is useful forsoaking the
. The book of photography; practical, theoretical and applied. g oven of the pattern shown by is very useful for drying quickly, butthe temperature should on no account ex-ceed that required to promote a slightlywarm current of air, actual heat beingavoided. If the paper is squeegeed toglass, it should first be thoroughlydrained. Printing and Inking-up. A printing frame of the box pattern,with strong springs, should be used to board (Fig. 892) is of great assistance forholding the paper steady during theoperation. Developing the Transfer A rather deep zinc tray is useful forsoaking the paper after inking-up. Whenthe inked transfer has been in the waterfor about a quarter of an hour it is takenout and placed on a sheet of glass orother flat surface, the superfluous mois-ture being then lightly blotted off. Asecond velvet roller, uninked, is nowpassed over the print, removing most ofthe unnecessary ink, and leaving only theimage. Any remaining ink is very gentlytaken off with a soft wet sponge, appliedwith a circular motion. If the ink does. SJl.—AELVEX ItoLLKK. ensure perfect contact, the paper being-filled in in yellow light or gaslight. Thenegative must be a bright black and whiteone, on Avet collodion or photo-mechanicaldrj plates, and free from flaws orscratches. Printing may either be ex-amined during progress, or judged byactinometer. The next proceeding is theinking-up, which should be done in aroom of even temperature. For this pur-pose transfer ink is used, the ink beingw-ell distributed over a stone ink slabwith a lithographic leather roller, a velvetroller (Fig. 891) being then employed totake up sufficient ink from the slab. Iftoo stiff, the ink is thinned with a littlepoppy or almond oil, thoroughly mixingwith a palette knife before using ; if toothin, some stiff lithographic ink must beadded. The dry print is roiled witli thevelvet roller until it appears of an evenlight grey tint; it is then placed in coldwater. Another method of inking-up is
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