MOUNTING GLAZED PRINTS.
As the glazed surface of the print would be injured or removed by again wetting it, a different method of mounting becomes necessary. A waterproof backing paper is obtainable ,which enables the prints to be mounted with starch without injury. A sheet of this backing paper is cut to the same size as the print, and pasted on the back of the latter before it has dried on the glass or ferrotype plate. The two come off together, when starch or any similar adhesive may be applied to the water proof back of the print as usual, care being taken not to allow any to get on the face. Ordinary thick paper is sometimes made to serve as back ing, but in this case gelatine or glue must be used for mounting, applied to the edges only, for a width of about in. all round, with a small brush. Another method is to paste or glue the back of the print while on the glass, before it is dry, and to squeegee the mount down to it. If this is
properly done, the print will come off ready mounted. Care must be taken that none of the adhesive gets over the edges of the print and on to the glass ; if this happens, it must be removed with a damp sponge, or the mount will stick. Bather thin mounts are best for this method of mounting. Glazed prints may also be mounted with india-rubber solution or shellac, as previously described (I). 2; 5) in which case backing is unnecessary. Another method is to harden the prints after washing in a 10-per-cent. solution of formalin, allowing them to remain in this for five minutes. They are then washed for three minutes, and at once squeegeed in the ordinary way. When stripped they may be placed in water and mounted with starch without fear of injuring the glaze.