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.
Posted by David Lyga 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
Posted by R'n'D Printing 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****
Posted by Richard Rees on 27th Jan 2016
Did not dissolve in distilled water. still in bottom of jar.
The distilled water might need to be heated to get this to mix into solution.