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It is the Photographers' Formulary Sodium Carbonate, a pure and professional-grade chemical, that serves as a key accelerator in the development process of black and white film photography. This high-quality, anhydrous Sodium Carbonate is recognized for its reliability and durability in the photography industry. As one of the principal alkalies used in development, it plays a significant role in achieving the desired contrast and tonal range in your photographs. Please note that Balanced Alkali (Kodalk) can be used interchangeably with Sodium Carbonate, offering flexibility in your photographic process. However, caution should be exercised as Sodium Carbonate releases a gas when introduced to an acid stop bath or an acid fixing bath. This reaction may lead to the development of pinholes or "blistering" in film emulsions. Ideal for professional photographers, this 5lbs bulk package of Sodium Carbonate ensures you have a consistent supply for your photographic needs.