This section is from the book "Complete Self-Instructing Library Of Practical Photography", by J. B. Schriever. Also available from Amazon: Complete Self-Instructing Library Of Practical Photography.
Trimming Ovals. While not all pictures are suitable for this form of trimming, frequently the oval form will enable you to cut off an objectionable corner. When the composition has many straight lines the oval trimming will greatly improve the print. Special points of interest may be accentuated by oval or circular trimming.
Trimming Appliances. The edges of prints must be clean and perfect, no matter whether trimmed
Illustration No. 25 Ingento Revolving Trimmer See Paragraph No. 1213 in the oval form or square. Ragged edges of circles and ovals not perfectly shaped will make prints worthless. There are special manufactured appliances for the proper trimming of the oval, which will be found at any photographic supply house. Where 4 x 5 or smaller prints are to be trimmed square, the "Ideal" print trimmer is a most practical device. It is made of metal, finely plated, and equipped with a graduated measure. (See Illustration No.
23.) To trim the print place it in the trimmer, with the edge to be trimmed under the guide and the adjoining side in contact with the measure, at the top. Press the thumb on the guide which holds the print in place, and then with a pair of shears cut along the edge of the guide.
1213. Illustration No. 25 is an "Ingento" Revolving Trimmer. For trimming circles and ovals this trimmer will be found absolutely perfect. Every bearing of its mechanism is of tempered steel, and it is built on lines of highest efficiency and durability. The post revolves on a group of steel balls, cutting down the friction to a minimum, thereby allowing the post to glide smoothly and freely during the operation of trimming. The cutting wheel, also the pin on which it revolves, is made of the finest tool steel and highly tempered, making it impossible for them to wear. The wheel is made with a bearing of 1/8 inch, instead of only the thickness of the wheel as in all other trimmers. This large bearing prevents the wheel from wabbling and binding on the pin, at the same time decreasing the chances of wear. Five different sizes from one form can be cut with this trimmer by changing the wheel and flange in different positions, making it possible to make four sizes of masks; hence four different widths of white margin on the finished prints. All metal work is handsomely nickel-plated and polished, and the handle, to be in keeping with the high-grade finish of all other parts, is mahogany finished and hand polished. Extra wheels can be purchased for this trimmer.
1214. Illustration No. 26 shows the "Ideal" Cut-Out Forms. These Ideal Forms are ground off smooth inside, which allows the cutting wheel to slide along smoothly. These sizes and shapes are perfectly adapted for the standard sizes of mounts. They are made of brass in the hard material and are handsomely polished and lacquered.
1215. Illustration No. 27 is the "Ingento" Form Holder. This holder is an indispensable accessory to the perfect cutting of oval prints. It is made entirely of metal, which gives it lasting qualities and also guarantees it against warping. There are no useless levers or springs in the way during the operation of cutting. The form being held securely in the clamping lever retains its same position, which facilitates the quick and accurate cutting c of the prints. When this form holder is used, prints are cut in the shortest possible space of time. The cutting plate is made of zinc and is reversible, so that either side can be used. The complete device is handsomely nickel-plated and is mechanically perfect. Made in two sizes; 5 1/2 x 8 1/4 and 8 x 10.
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Illustration No. 26 Ideal Cut-Out Forms See Paragraph No. 1214.
1216. Illustration No. 28 is called the "Ingento Centering Square." There are few photographers who have not experienced more or less trouble in centering photographic prints on plain mounts or in mat openings. With this novel square the operation is so simplified that the print or open-
Illustration No. 27 Ingento Form Holder
See Paragraph No. 1215 ing can be instantly and accurately centered with equal margins all around. The square is made of heavy sheet brass, accurately graduated from one to five inches, and handsomely nickel-plated. Full directions for using accompany each square.
Illustration No. 28 Ingento Centering Square See Paragraph No. 1216.
1217. Another very useful implement is a celluloid square. This can be purchased at any artist supply store. It should be of good size. When selecting a square be sure to get one which is really at perfect right angles on its working sides. The advantage of using a transparent square is that it does not conceal any part of the print that you are trimming. It will enable you to do the work with ease; to see what remains as well as what is cut from the print. Another advantage is that you are enabled, by proper placing of the square on the print, to make two cuts before lifting it, with the assurance that they are at perfect right angle to each other.
1218. When trimming prints, printed under a mask and having white edges, the celluloid square is particularly useful. We would caution you, however, to be very careful when using the knife with the square. The substance from which the square is made is much softer than the blade of the knife, so always turn the knife edge slightly away from the square, to avoid cutting it. With a little experimenting and practice you will be able to trim prints without injuring the square.