Photography Its Principles And Applications
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What reading level is Photography Its Principles And Applications book?
To quickly assess the difficulty of the text, read a short excerpt:
1.
Hydroquinone ... 90 grains.
Metol 30 „ Soda sulphite... ... 2 ounces.
Water to make ... 10 No. 2.
Soda carbonate ... 2f ounces.
Water to make ... 10 DEVELOPMENT INELTJENCES 86 One dram of each made up to 1 ounce of water is the standard strength, the Watkins factor being 15.
If used for bromide or gaslight paper add ^ grain potassium bromide to each ounce of complete developer.
If in cold weather a precipitate is formed in No. 1, it makes no difference if the bottle is shaken before measurin...g out, as it dissolves with dilution.
Potassium bromide is often required, and is most con- veniently kept in a (so-called) 10 per cent, solution, as every 10 minims of this contains 1 grain of the salt, and it can be easily measured out.
10 % Bromide.
Potassium bromide 1 ounce.
Water to make ... ... ... ... 9 ounces 1 dram.
Add about J grain (5 minims) to each ounce of a developer when a restrainer is thought necessary.
Other Developers. — There is a large variety of developing salts on the market, with slight variations in characteristics, but not one with any greater or less power of developing light action than another.
What to read after Photography Its Principles And Applications?
You can find similar books in the "Read Also" column, or choose other free books by Alfred Watkins to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
1.
Hydroquinone ... 90 grains.
Metol 30 „ Soda sulphite... ... 2 ounces.
Water to make ... 10 No. 2.
Soda carbonate ... 2f ounces.
Water to make ... 10 DEVELOPMENT INELTJENCES 86 One dram of each made up to 1 ounce of water is the standard strength, the Watkins factor being 15.
If used for bromide or gaslight paper add ^ grain potassium bromide to each ounce of complete developer.
If in cold weather a precipitate is formed in No. 1, it makes no difference if the bottle is shaken before measurin...g out, as it dissolves with dilution.
Potassium bromide is often required, and is most con- veniently kept in a (so-called) 10 per cent, solution, as every 10 minims of this contains 1 grain of the salt, and it can be easily measured out.
10 % Bromide.
Potassium bromide 1 ounce.
Water to make ... ... ... ... 9 ounces 1 dram.
Add about J grain (5 minims) to each ounce of a developer when a restrainer is thought necessary.
Other Developers. — There is a large variety of developing salts on the market, with slight variations in characteristics, but not one with any greater or less power of developing light action than another.
What to read after Photography Its Principles And Applications?
You can find similar books in the "Read Also" column, or choose other free books by Alfred Watkins to read onlineMoreLess
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