. The book of photography; practical, theoretical and applied. he scissors ;but this practice is not recommended. 276 THE BOOK OF PHOTOGRAPHY. Trimming Circular and Oval Prints. For trimming circular and oval prints,ground glass cutting-shapes are obtainable,which are used in the ordinary of zinc having an opening of theshape required are also very suitable ; a setof these, supplied for use with a wheel trim-mer with them, is shown by Fig. 394. Intrimming prints by this method, it is neces-sary to keep the cutter nearly upright, andpressed closely against the inside edge of lows:
. The book of photography; practical, theoretical and applied. he scissors ;but this practice is not recommended. 276 THE BOOK OF PHOTOGRAPHY. Trimming Circular and Oval Prints. For trimming circular and oval prints,ground glass cutting-shapes are obtainable,which are used in the ordinary of zinc having an opening of theshape required are also very suitable ; a setof these, supplied for use with a wheel trim-mer with them, is shown by Fig. 394. Intrimming prints by this method, it is neces-sary to keep the cutter nearly upright, andpressed closely against the inside edge of lows: Cut a print or a piece of ordinarynote-paper by means of the glass, and,folding it over without bending, bring thetop and bottom edges together (see ). These should agree exactly in fold the paper over the other way,this time bringing the two side edges to-gether ; if these also agree, the glass maybe regarded as correctly ground. If, how-ever, the folded edges of the print do notagree, the glass is manifestly untrue, andshould be the pattern. There are various patenteddevices for cutting circles and ovals of anysize, most of which depend in principle onthe revolution of a fixed cutter, somewhatafter the style of a compass, the radiusbeing adjustable. In all cases, the knifeor cutter should be kept extremely sharp,as it is easier to tear these prints while cut-ting than those which have straight edges. Testing the Cutting-glass. In purchasing the glass shapes for cut-ting rectangular prints, see that they haveabsolutely straight edges and truly squarecorners. This is by no means always thecase, and it is better to test them beforeusing. This may readily be done as fol- HoME-MADE workers prefer to make their ovitrimming-glasses. Old negative glassesfrom which the film has been removed maybe adapted for the purpose. These shouldhave at least two good straight edges, alright angles to each other, and should be-free from cracks or
Size: 2081px × 1200px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectphotography, bookyear
