Patent Abridgment 1856 |
2345 |
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2345. Wilkinson, W. Oct. 7.
Transparencies; transparent and translucent materials. Transparencies are made by inserting designs, pictures, prints, wax flowers, imitation animals, lace or other textile fabrics, perforated metal or wire gauze, or plaster, alabaster, gutta-percha, metal, or other devices between two glass sheets. An engraving, print, &c. on paper may be first rendered transparent by soaking in oil or oleaginous matter, drying, and immersing in turpentine or spirit. The prepared paper is then cemented to one glass sheet, and tape or the like is cemented to the edge of the glass sheet, after which the two glass sheets are secured together by india-rubber, gutta-percha, or a metal clamp or frame, or by melting the edges. A glass case containing water may be attached to one glass sheet, or may be formed in one therewith. When coloured engravings or prints are employed, spirit wash is applied to the glass sheet, and a drying spirit is brushed over the engraving, after which the engraving is placed on the glass sheet, and a mixture of oil and spirit is applied to the back of the engraving until the design is seen. The oil and spirit are then wiped off, and the second glass sheet is fixed in position. |
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