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Edwal Sodium Sulfite (Powder) - 2 Lbs.

B&H # EDSS2LB MFR # EDS2
Edwal Sodium Sulfite (Powder)

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Edwal Sodium Sulfite is a photo-grade powder, that may be used in any photographic formula.

Sodium Sulfite is packed in an unbreakable 2 lb. plastic jar containing a speed cups.

When added to FG7 1:15 dilution in a 9% solution it produces a fine enough grain on medium and high speed films for practically any degree of enlargement
By adding 10 grams of Edwal Sodium Sulfite per liter to exhausted fixer, it helps stabilize the fixer for silver recovery
It is also used commonly to clear Polaroid black & white negatives in the Field or in the studio
Synonyms Sulfite of Soda
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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