A maximum acutance, ultra-fine grain film developer, combining optimum quality, with great effective film speed. Similar to Acufine developer, but to be used as a "one-shot", throw away developer. Same increase in film speed ratings without sacrificing grains or contrast. Concentrate features practical and convenient dilution ratio of 1:5 and 1:10 and is an ideal preparation for the occasional user and for those preferring a non-replenishing "one-time" developer. One quart will process over 40 rolls of film at the 1:10 ratio with all the quality advantages of Acufine Developer.