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Edwal Sodium Sulfite (Powder) - 2 Lbs.
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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Comments about Edwal Sodium Sulfite (Powder) - 2 Lbs.:
My dad uses Sodium Sufite to cure salmon eggs for bait (not to eat). When he ran out he went all over town, but digital has led to every local photo outfit not carrying chemicals anymore (or going out of business). Since I had a b&w darkroom 20 years ago he asked me if I could find it. So of course I ordered from B&H[...] I don't know if using sodium sulfite to cure bait is common practice in the lower 48, but let me tell you it works great. It gives salmon eggs the consistency of firm gumdrops. Dad says this Edwal Sodium sulfite is the best he's used, he thinks it works better because the granules are finer than with other products. But that's just a theory, either way it works best. I am making another purchase from B&H this afternoon and recommend them as my first choice for internet photography shopping to anyone who asks (I'm the photo hobbyist in the family).
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