Here's a report from Kyle who got nice results with the Delta 400. Let's read what he writes:
"Hello my name is Kyle LeNoir. I have been doing film photography for 6 years. I currently work freelance as an event digital photographer and film photography tutor in chicago (USA). Stand processing is my preferred way to process film since I darkroom and alternative print or scan depending on the print size. So far I have done 10-12 rolls with C-C-L. I found the results comparable or better to standing in rodinal 1:100 or GSD-10. I am thinking of changing my times to 60min to ease printing in wet darkroom.
Caffenol C-C-L @70 degrees Fahrenheit
nescafe clasico instant coffee
jacquard soda ash (anhydrous)
Vitamin Shoppe C-1000 Powder (Ultra-fine ascorbic powder)
photoformulary potassium bromide ( I used 1.5g per liter)
Ingredients weighted with black box jewelry scale
Camera was an agfa isolette II with apotar lens and metered with a sekonic studio deluxe (incident)
Epson Perfection V750 (no post processing except for cropping,setting white and black points,resizing)
slow agitation for first min (15 tilts) left still for 60min.
Ilford Delta 400@800 was a pleasant surprise. I have never been a fan of the look of this films tonality. I decided to give it another chance while on my local film store visit. The results were better in C-C-L than any other developer I used with this film so far. I got the tones I wanted from the film finally. The roll gave an good amount of overall detail and printed in the darkroom very well. I feel pretty confident that it should do pretty well at @1600."


Thank you very much, Kyle. Indeed looks like EI 1600 is very possible.
Cheers - Reinhold
"Hello my name is Kyle LeNoir. I have been doing film photography for 6 years. I currently work freelance as an event digital photographer and film photography tutor in chicago (USA). Stand processing is my preferred way to process film since I darkroom and alternative print or scan depending on the print size. So far I have done 10-12 rolls with C-C-L. I found the results comparable or better to standing in rodinal 1:100 or GSD-10. I am thinking of changing my times to 60min to ease printing in wet darkroom.
Caffenol C-C-L @70 degrees Fahrenheit
nescafe clasico instant coffee
jacquard soda ash (anhydrous)
Vitamin Shoppe C-1000 Powder (Ultra-fine ascorbic powder)
photoformulary potassium bromide ( I used 1.5g per liter)
Ingredients weighted with black box jewelry scale
Camera was an agfa isolette II with apotar lens and metered with a sekonic studio deluxe (incident)
Epson Perfection V750 (no post processing except for cropping,setting white and black points,resizing)
slow agitation for first min (15 tilts) left still for 60min.
Ilford Delta 400@800 was a pleasant surprise. I have never been a fan of the look of this films tonality. I decided to give it another chance while on my local film store visit. The results were better in C-C-L than any other developer I used with this film so far. I got the tones I wanted from the film finally. The roll gave an good amount of overall detail and printed in the darkroom very well. I feel pretty confident that it should do pretty well at @1600."


Thank you very much, Kyle. Indeed looks like EI 1600 is very possible.
Cheers - Reinhold