chromogenic processesKodachrome (TM)Kodacolor (TM)Ektachrome (TM)subtractive color processescolor couplers processescolor dye coupler processesdye coupler processesdye couplingdye coupling processesdye-couplingcolour coupler processescolour couplers processescolour dye coupler processeschromogenic development processeschromogenic systemcolor coupler processes