The Dictionary Of Photography

A True Historic Record Of The Art & Practice Of Photography 100 Years Ago.

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Emulsion
and the thumb of each hand, and dipped into the pool of emulsion right across the plate. The emulsion will run between the rod and the plate to each edge of the latter. By a motion of the finger and thumb of each hand, the rod is lifted the smallest possible distance from the plate, and is rapidly moved first to one end, then to the other, the tips of the finger and thumb resting on the level table as a guide. This, if properly done, will cover the whole plate with emulsion; and if the plate be small - half-plate or under - it is sufficient to send it to the far end of the table to set. If the plate be large, the coating will not be evenly spread unless it is lifted, balanced on the tips of the fingers of the left hand, and rocked gently for a few seconds. By this method the plates may, after a little practice,
Fig. so.
be coated with great rapidity. There is no need to wipe the rod each time it is used.
" As no excess is poured off the plate nor spilled in this method, it is possible, by using a very small teapot, to keep a constant check on the quantity of emulsion going on to the plates. The covering power of the slow emulsion will be found somewhat greater than that of the rapid. With each ounce of the slow emulsion, eight quarters or four half-plates may be coated ; with the rapid, only seven quarters or three halves.
"The plates will 'set' in a few minutes - that is to say, the emulsion will stiffen like a jelly, and will not run off the glass, whatever position it is placed in. They are now transferred to the drying box. When dry, they are ready for use.
"The drying box calls for some description. There are various
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