Originally Posted by AgX
Process Ektaprint-3 was introduced 1971.
Process C-41 was introduced 1975.
Agfa was the last western company to change over to oil-embedded couplers (Ektachrome principle).
They started that change in 1978.
AgX; Ektaprint 3 was actually introduced in 1969 at School Finishres of Webster! C41 was 1 year later.
Agfa introduced the new coulers in 1978, but stared R&D much earlier.