. The book of photography; practical, theoretical and applied. ented method of dry mount-ing by the agency of heat. A thin adhesivefilm is placed between the print and themount, the three being inserted in amachine which applies both heat and pres-sure. In a few seconds perfect adhesionis secured by the melting of special in-gredients contained in the film, the mountremaining flat and the print keeping itsoriginal dimensions. By this method large numbers of prints may be mounted in suc-cession, neat and clean, on even the thin-nest mounts, without wrinkling or material or fabric m
. The book of photography; practical, theoretical and applied. ented method of dry mount-ing by the agency of heat. A thin adhesivefilm is placed between the print and themount, the three being inserted in amachine which applies both heat and pres-sure. In a few seconds perfect adhesionis secured by the melting of special in-gredients contained in the film, the mountremaining flat and the print keeping itsoriginal dimensions. By this method large numbers of prints may be mounted in suc-cession, neat and clean, on even the thin-nest mounts, without wrinkling or material or fabric may be used. Afurther advantage is that complete isola-tion is ensured between the photographand the mount, so that even if the lattercontains injurious matter the permanencyof the print will not be affected. Theprocess is especially applicable to theinsertion of photographs as book illustra-tions, generally rather a difficult thing toaccomplish if the paper is thin. Severalpatterns of rimchines, of which Fig. 407 is atypical example, are made by the Adhesive. Fig 407.—Machine for Dry Mounting. Dry Mounting Company. The one illus-trated will roll and mount prints with anysurface, and will give^ if required, a plate-mark or relief border. Stretching of Prints in Mounting. When prints are mounted wet they tendmore or less to stretch, generally in thedirection of the width of the originalsheet. It should be noted which way thepaper stretches, so that the print may betrimmed to allow for this. The slightdistortion introduced is seldom of conse-quence, except in scientific and similarwork, where the greatest accuracy is neces-sary ; but in such cases, it is advisable toadopt a dry mounting process. Thisstretching of the print, as pointed out inanother section, may sometimes be turned 282 THE BOOK OF PHOTOGRAPHY. to good account in portraiture, as, for in-stance, in the case of a subject with a longface, which may be improved by cuttingthe paper so that it will stretch in thewidth ;
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphotography, bookyear
