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<p>[QUOTE=&quot;V. Kurt Bellman, post: 3235600, member: 71723&quot;]No, that&#039;s right as far as it goes. But toning is more complex than that. It requires both sulfur AND oxygen usually to get really rolling. When you still have the sulfur without the oxygen, you frequently pass the cooler colors and go straight to brown/black.</p><p><br /></p><p>Keep in mind that old-school black &amp; white photography is all about converting halides of silver into metallic silver and washing away silver sulfides in the processing. In color photography, the silver compounds are used as a catalyst to interact with dye couplers to create colored dyes in the emulsion layers, one cyan, one magenta, and one yellow, and hopefully ALL the silver ends up washed away, into the fixer bath or the bleach-fix.[/QUOTE]</p><p><br /></p>

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