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4 Stars

Product Description

10-0250 10 g, 10-0250 100 g, 10-0250 1 lb

To Make antifog 

Take 10 grams of Benzotriazole and mix into 500 Ml of hot distilled water. Add 15 to 30 ml to a liter of developer working solution. Always start with the smallest amount, add more if needed.


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  1. Benzotriazole 4 Star Review

    Posted by on 23rd Apr 2019

    I started using this in place of Edwal's Liquid Orthazite as a restrainer in Beer's formula paper developers. I was able to make a 1% solution in warmed distilled water without much trouble that has worked fine.

  2. Too early to tell 3 Star Review

    Posted by on 28th Mar 2019

    This is my first time using benzotriazole and only on one paper so far. It lightened the grayscale of Ilford FB Classic when added to the developer. That's about all I can say for now. It took a long time to dissolve: almost not at all in room temperature water. Hot water was better, but still took a long time to dissolve.

  3. many iterations of the physical configuration 5 Star Review

    Posted by on 25th Mar 2018

    I am 68 and have been buying photo chemicals for five decades. Benzotriazole used to be sold by Kodak. Then, in the 60s, it came as a powdery substance. Then, decades later it came a 'feathers' (very light and could not be poured). Now, it comes in granules and is easy to pour into a vessel. Why this is so I do not know but I like this new form. - David Lyga

  4. THE safest GO-TO cold tone solution 5 Star Review

    Posted by on 14th Sep 2017

    Don't bother ordering your Photo Formulary supplies from another site. You will not receive the same, highest quality chemical's from another site/store.
    Using the Benzotriazole in paper developer's, you will get the richest, deep blue/black tones you desire.
    ****Remember, like many chemicals, you must heat up the distilled water to at least 125F for BZT to dissolve in the solution****

  5. mixing 2 Star Review

    Posted by on 27th Jan 2016

    Did not dissolve in distilled water. still in bottom of jar.

    Photographers :
    The distilled water might need to be heated to get this to mix into solution.

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