Question

which compound is used for toning in photography​

Answer 1

Explanation:

Selenium toning is a popular archival toning process, converting metallic silver to silver selenide. In a diluted toning solution, selenium toning gives a red-brown tone, while a strong solution gives a purple-brown tone. The change in color depends upon the chemical make-up of the photographic emulsion being toned.

Answer 2

The compound used for toning in photography is silver compounds such as sodium sulfides.

• Toning is the process of changing the background of a photograph that has a black and white background.
• Based on the process toning can be of different colors and sometimes it colors one part more than the other part.
• In this technique salts of silver, iron, platinum and palladium are used.
• The technique can be impersonated in digital and monochrome photography.
• It increases the shades in a painting.
• Sepia and selenium are common examples.
• In selenium toning, metal is converted to silver selenide.
• Toners used in toning are thiourea, sodium sulfide, and polysulfides.
• Polysulfide toners do not require bleaching agents.

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