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Under the trusted brand of Photographers' Formulary, the Reducer I for Black and White Film is a professional-grade, high-quality hypo-potassium Ferricyanide negative reducer. This product is designed to be comparable to the renowned Kodak R-4a and Kodak R-4b, ensuring reliable and efficient performance in film reduction.
This durable reducer kit is comprised of two key chemicals, potassium ferricyanide and sodium thiosulfate, which are used to create two distinct stock solutions. The versatility of this product lies in its ability to function as either a sub-proportional or proportional reducer, depending on the relative amounts of the two stock solutions used in the working solution.
In its sub-proportional mode, the Reducer I selectively removes silver metal from low-density areas at a faster rate than from high-density areas. This unique feature makes it an ideal solution for improving over-developed negatives, enhancing the quality of your black and white film photography.
The working solution amounts are flexible and depend upon the dilution you choose, offering you greater control over your film reduction process. Whether you're a professional photographer or an enthusiast, the Reducer I for Black and White Film from Photographers' Formulary, available at Adorama, is a reliable and efficient choice for your photography needs.