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.
Pour some dry mustard seed into the bottle and shake well. The seeds soon absorb the moisture and leave the interior of the bottle clean and dry.
Alkalies attack the glass of bottles as well as stoppers and tend to cement them together. For this reason they should be treated with paraffin wax.
(a) Tip the bottle slightly to one side, yet not sufficiently to have the solution run into the neck. Then quickly heat the neck of the bottle with a lighted match or candle. This causes the neck to expand slightly, which will invariably loosen the glass stopper. The bottle should, of course, be revolved so as to heat all sides of the neck uniformly.
(b) Run a little sweet oil around the stopper and allow it to stand for about an hour.
(a) | Copper Nitrate................................... | 100 grs. |
Water................................................. | 1/2 oz. | |
(b) | Silver Nitrate...................................... | 100 grs. |
Water................................................. | 1/2 oz. |
After preparing the two solutions separately, mix. Clean the brass thoroughly, and them place in the solution. Remove and heat considerably.
A term, in composition, to denote the proper balance and relative value between the lights and darks of a picture. Breadth is secured by making a principal object predominate, keeping parts of secondary importance in due subordination.
When a negative is snappy and bright, possessing pleasing contrast between high-lights and shadows, it is said to be brilliant. Brilliancy results from correct exposure and careful development.
(See Barium Bromide.)
(See Cadmium Bromide.)
(See Calcium Bromide.)
(See Potassium Bromide.)
(See Silver Bromide.)
(See Sodium Bromide.)
Paper coated with sensitive gelatino-bromide of silver, and employed for enlargements or contact printing. Must be handled in deep yellow or ruby light. There are various grades, surfaces, degrees of sensitiveness, etc. (See Gaslight Paper.)
Br.
Very dark reddish-brown liquid. Poisonous. Compounded with silver, potassium, ammonium, etc., is vitally useful in photography. Silver bromide, especially, forms the principal sensitive chemical in the dry plate emulsion. Potassium bromide is very useful as a restrainer in developing solutions.
 
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