The book of lantern ; being a practical guide to the working of the optical (1888)

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142 THE BOOK OF THE LANTERN. The black masks can be bought ready cut at about three- pence the dozen, or the worker can cut his own if he prefer it. Zinc patterns are sold for this purpose, together with a clever cutting tool, which consists of a little steel wheel set in a handle (see fig. 43). The pattern is placed above the FIG. 43. paper to be cut, the little wheel is run round the opening in the zinc, and a cleanly cut mask is the result. A sheet of glass is the best bed upon which to lay the paper when cutting it. The gummed slips can also be bought, but those who prefer to be self-dependent will make their own in the way described. Not long ago I compared one of my slides with a wet plate—one taken from the same negative—by a first-rate operator, who is used to this class of work, and hardly does anything else. He was bound to admit that the gelatine picture was the better of the two, and said that he should think of relinquishing his bath after seeing what gelatine plates could do. I advised him to do no such thing. A wet plate is so certain in its results, that an unskilled hand, if he be furnished with the materials, can produce picture after picture without difficulty. I cannot say the same of gelatine plates, for they are such ticklish things that oftentimes something or other will go wrong.