Agfa stock degradation

[granfer]

I've just finished transferring 1200 ft of Super 8 film shot and processed in 1985. It's a mixture of Kodachrome and Agfa Colour. The Kodachrome is stunning, crisp with sparkling colour.... but most of the Agfa is marred by random blotches, not there when first processed. Been stored along with thousands of other feet of film going back 52 years, so not a storage problem.
Anyone else had this with Agfa?

[mr8mm]

Another reason to weep for Kodachrome. --J.S.

[richard p. t.]

Yes, that is a standard result from old Agfachrome.
As john says, longevity was a fantastic feature of kodachrome dyes. Old ektachrome also fades, though IMHO not as badly as Agfa. New Ektachrome apparently has far superior dyes to the older versions. Sill it won't last as long as kodachrome.
rt

[Tommy]

I have agfachrome standard 8mm from 1970 stored on the same reel with Kodachrome. The Agfachrome looks just like the day I shot it. It sounds like your Agfa was processed on a day with bad chemistry/poor stabilization. Lab quality could differ day to day.

[granfer]

I must agree that all the Agfa was processed at the same time as it was from a holiday trip (as was the Kodak.. the same trip).
Methinks that somewhere I have another holiday on Agfa, this time processed in both UK and Tenerife. I'll dig that out and check it.
Or could it be that Standard 8 (1970) and Super 8 (1987) were actually different Film Stocks?

[jpolzfuss]

Or could it be that Standard 8 (1970) and Super 8 (1987) were actually different Film Stocks?

Yes. The Standard8-film is on Agfacolor (most likely "CT 13 Type S") that uses the "Agfa-chemistry", while the Super8-film is on Agfa Moviechrome 40 (Emulsion III unless it was an older Emulsion II that was made until 1986) that uses the "Kodak-chemistry".

[Will2]

That same Kodachrome will look just as good 50 years from now. Even if you don't treat it well. I noticed that with slides from the early 50's. Kodachrome looked like it was shot yesterday, any other slide film was cracked and faded. These were all kept in the same box under the same conditions.

[71er]

About 30 year old Agfa Super 8 film stock in my possession has faded in colour; it has a pinkish tint; no other degradation visible.