| 1. | It was introduced as a developing agent for photographic papers in 1892.
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| 2. | In 1969, he began experimenting with the forgotten photographic developing agent Pyrogallol.
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| 3. | Sodium carbonate is also used as a relatively strong film developing agents.
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| 4. | It uses derivatives of ascorbic acid ( vitamin C ) and phenidone as developing agents.
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| 5. | Other developing agents in use are p-aminophenol, glycin ( N-( 4-hydroxyphenyl ) glycine ), pyrogallol, and catechol.
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| 6. | Spagnoli at first hesitated to make daguerreotypes because one of the main developing agents is deadly mercury vapor.
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| 7. | A brief exposure to a negative produces a latent image, which is then made visible by a developing agent.
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| 8. | Developing agents are commonly hydroxylated benzene compounds or aminated benzene compounds, and they are harmful to humans and experimental animals.
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| 9. | Glycin is rarely used as a developing agent today, primarily because it is expensive and manufactured for specialty applications only.
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| 10. | Ascorbic acid and its isomers, and other similar sugar derived reductone reducing agents are a viable substitute for many developing agents.
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