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Photographers' Formulary Sodium Sulfite - 1 Lb.

B&H # PHSSLBZ MFR # 10-1340 1LB
Photographers' Formulary Sodium Sulfite - 1 Lb.

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Synonyms Sulfite of Soda
Sodium sulfite anhydrous
Disodium sulfite
Sulfurous acid, disodium salt
Exsiccated sodium sulfite
Appearance White Granular Crystals, or powder
Uses As a preservative of developing agents
Constituent of the acid fixing bath
Blackener in negative intensification
Active energizer in amidol development
To clear Polaroid Type 55 black & white negatives
Chemical Formula Na2SO3
Notes Sodium sulfite is the most widely used preservative in developers. It also plays an important part in the process itself.
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