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Photographer's Formulary Pyro Triethanolamine Film Developer, is a formula that was first published in Peterson's Photographic, July 1984 issue.
Written by Paul Farber, the demand was so great for this developer, the Photographers Formulary made the kit availible with his permission.
Mr. Farber stated in his article that this developer was intended for the production of large negatives, but has also proved exceptionally good on small format.
It has smooth grain structure and full emulsion-speed capability. It lasts longer than other developers and can be replenished just by adding fresh developer to make up the lost volume, and this can go on for years.