Arista.EDU Ultra B&W film is compatible with all major processing systems. Recommended developing times are for normal contrast negatives (based on intermittent agitation.) All developing times are standardized for 68 Degree F (20 Degree C). Your developing time may vary based on environment and equipment used.Developer: Arista 76 PowderDilution: StockTime @ 68 Degree F (20 Degree C): 6 - 7Developer: Arista 76 PowderDilution: 1:1Time @ 68 Degree F (20 Degree C): 8 - 10Developer: Arista Premium PowderDilution: StockTime @ 68 Degree F (20 Degree C): 6Developer: Arista Premium PowderDilution: 1:1Time @ 68 Degree F (20 Degree C): 7Developer: Arista Liquid Film DeveloperDilution: Working SolutionTime @ 68 Degree F (20 Degree C): 7Developer: Arista Premium Liquid DeveloperDilution: 1:9Time @ 68 Degree F (20 Degree C): 7Developer: Marathon Film DeveloperDilution: 1:9Time @ 68 Degree F (20 Degree C): 6Developer: Ilford ID-11, Kodak D-76Dilution: StockTime @ 68 Degree F (20 Degree C): 6 - 7Developer: Ilford ID-11, Kodak D-76Dilution: 1:1Time @ 68 Degree F (20 Degree C): 8 - 10Developer: Kodak XTOLDilution: (Straight)Time @ 68 Degree F (20 Degree C): 5 - 6Developer: Kodak TMAX DeveloperDilution: 1:4Time @ 68 Degree F (20 Degree C): 5 - 6Developer: Kodak HC 110Dilution: 1:31Time @ 68 Degree F (20 Degree C):NRDeveloper: Agfa RodinalDilution: 1:25Time @ 68 Degree F (20 Degree C): 3 1/2Recommended Agitation: Agitate continuously for first 30 seconds of development, then provide agitation of 5 to 7 inversion cycles for 5 seconds every 30 seconds for remainder of development time.Where continuous agitation is used for rotary processor, reduce the developing times by 15%.Development times may need adjusting to suit individual processing systems and working practices. If an established system is producing good results, adjust the recommended development times until the desired contrast is obtained.This material will be replaced if found defective in manufacture, labeling or packaging. Except for such replacement, this product is sold witout warranty or other liability.