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Photographers' Formulary Sodium Thiosulfate (Hypo) Penta (Prismatic Rice) - 1 Lb.

B&H # PHSTPLB MFR # 10-1360 1LB
Photographers' Formulary Sodium Thiosulfate (Hypo) Penta (Prismatic Rice) - 1 Lb.

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Sodium thiosulfate is one of the few know substances that will dissolve silver bromide. As such it is universally used in modern photographic procedures.

In this process known as "fixation," the unexposed silver bromide is dissolved in the sodium thiosulfate by combining with it to form soluble complex thiosulfates of silver and sodium.

Synonyms Antichlor
Hypo
Hyposulfite of soda
Sodium hyposulfite
Sodium subsulfite
Sodium thiosulfate, pentahydrate
Thiosulfuric acid, disodium salt, pentahydrate
Appearance Large white monoclinic, colorless crystals and powder
Odorless
Uses In preparation of fixing baths
Ingredient in various reducers
Chemical Formula Na2S2O3.5H2O
Notes Hypo is available in two forms: anhydrous and, more commonly crystalline. Crystalline hypo, when dissolved, lowers the temperature of the water considerably, whereas anhydrous does not.

Always begin with water of at least 90°F/32°C when mixing the crystalline form. Use 64% of the anhydrous salt as a substitute for crystalline hypo.

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Photographers' FormularySodium Thiosulfate (Hypo) Penta (Prismatic Rice) - 1 Lb.
 
4.8

(based on 5 reviews)

Ratings Distribution

  • 5 Stars

     

    (4)

  • 4 Stars

     

    (1)

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100%

of respondents would recommend this to a friend.

Pros

  • Consistent reactions (3)

Cons

    Best Uses

        • Was this a gift?:
        • No (3)

      Reviewed by 5 customers

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      5.0

      Very Satisfied!!!!!

      By Joye

      from Poplarville MS

      Comments about Photographers' Formulary Sodium Thiosulfate (Hypo) Penta (Prismatic Rice) - 1 Lb.:

      I'm an illusionist and was needing to find a way of getting a larger quantity of this chemical. And the price could not be beat! The product I received was just what they said it would be. I will be placing all my orders in the future with B&H as well as refer my photographer friends to them!

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      5.0

      dissolves easily

      By Edmond

      from Union City NJ

      About Me Casual Photographer

      Verified Buyer

      Pros

      • Consistent Reactions

      Cons

        Best Uses

        • Printing

        Comments about Photographers' Formulary Sodium Thiosulfate (Hypo) Penta (Prismatic Rice) - 1 Lb.:

        The Sodium Thiosulphate pentahydrate from Photographers formulary dissolves very cleanly and stores nicely. This is a great product if you need pure hypo.

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        5.0

        works great

        By David

        from NC USA

        Comments about Photographers' Formulary Sodium Thiosulfate (Hypo) Penta (Prismatic Rice) - 1 Lb.:

        Using this to fix caffenol developed negatives. Works fantastic as a 15% solution.

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        4.0

        Sodium Thio maintains a solid fix

        By ConcreteSnowman

        from Grand Rapids, MI

        About Me Photography Student

        Verified Buyer

        Pros

        • Cheap
        • Clean
        • Consistent Reactions

        Cons

        • Can accumulate moisture
        • Heavy

        Best Uses

        • Printing

        Comments about Photographers' Formulary Sodium Thiosulfate (Hypo) Penta (Prismatic Rice) - 1 Lb.:

        Sensitivity of the fix is obviously dependent on the solvent. Works just as it should-- price is as cheap as Bostick & Sully..

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        • No

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        5.0

        works perfectly

        By lizard

        from fulton, ms

        About Me Casual Photographer

        Verified Buyer

        Pros

        • Consistent Reactions

        Cons

          Best Uses

          • Developing

          Comments about Photographers' Formulary Sodium Thiosulfate (Hypo) Penta (Prismatic Rice) - 1 Lb.:

          used the thiosulphate to fix my film after caffenol developing works better and was cheaper than regular fixer

          • Was this a gift?:
          • No

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