Yes Fred, both used RDRs (Redox Dye Releasers) with an ETA in the pod to facilitate dye release. It used Reversal F emulsions to get an ISO of about 100 (? - I've forgotten the speed). A 3000 speed counterpart with metallized dyes was under development. It used negative emulsions and got very high speed via some interesting technology. The dyes were very stable.