Orders placed after 4PM on weekdays will not ship until the next business day. Orders placed after 11AM Fridays will not ship until the following Monday.
Faster shipping methods may be available; just upgrade during checkout.
*Some exclusions apply.
Enter new zip code to refresh estimated delivery time.
This is 10 lb of anhydrous Sodium Sulfite from Photographers' Formulary. It is most commonly used as a preservative in developing agents and is also an active energizer in Amidol development. It is also used within acid fixing baths and as a blackener for negative intensification processes.
Table of Contents
Sulfite of Soda Sodium sulfite anhydrous Disodium sulfite Sulfurous acid, disodium salt Exsiccated sodium sulfite
White granular crystals or powder
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
Sodium sulfite is the most widely used preservative in developers. It also plays an important part in the process itself.