Ilford Colour Transparency Films


Ilford Colour Film D was replaced in 1960 by Ilfachrome. The Kodak patents around certain aspects of the processing of Kodachrome had expired. Therefore the barrier layers were no longer needed and the speed was increased to 32 ASA however Agfa objected to the Ilfa prefix and in 1962 the material was renamed Ilfochrome. The subtractive reversal monopack with colour couplers in the developers type configuration of Type D was retained. Ilfochrome was replaced in 1965 by Ilford Colour Slide (32 ASA) and the faster Super Colour Slide (64 ASA). These later films were of the substansive type with the colour couplers in the emulsion immobilised by long chain hydrocarbon residue, i.e. Agfa type colour reversal films. An unconfirmed source has suggested that Ilford did not manufacture these substansive emulsions and that Ferrania of Milan or Adox of Weisbaden may have manufactured these films for them.

Ilfochrome is advertised in the 1961 British Journal Photographic Almanac along with Ilfacolor negative film and paper. All before Agfa's protests were headed and the products were re-branded with the "Ilfo" prfefix.

Instant loading cameras were all the rage in the 1960s with the introduction of the Kodak 126 Instamatic system. Agfa retaliated with a revival of their "Karat" system re-launched as the "Rapid" system. Standard 35mm film was used in special cassettes. Ilford manufactured negative and reversal films for this system.

For more details on the products of Ilford Limited see Maurice Fisher's Photomemorabilia web site.