Today I mixed my usual 11 oz batch (320 ml) that will aloow me to develop one tank og 35mm film.
Standard Ascorbate CH /CM chemistry
Water to 1000 ml
Soda 54 gram
Vit C 16 gram
Coffe 40 gram
(KBr 0,75 gram)
Mixed in the order given.
The measures for 320 ml
Water to 320 ml
Soda 17,3 gram
Vit C 5,1 gram
Coffe 12,8 gram
(KBr 0,26 gram)
Mixed in the order given
I did my usual measure with standard US measures as I weighed out :
Water to 11 US fl. oz.
Soda 3 teaspoon plus 1 pinch
Vit C 2 teaspoon minus 1 pinch
Coffe 7 teaspoon plus one pinch
(KBr 0,26 gram)
These volumetric measures given here are accurate to 0,05 gram
As I had the developer ready I started with a Generic brand 400 ISO C41 color negative film.
Time 21 minutes @ 20 centigrade, normal stop, fix and wash, ISO 400
I added one teaspoon of coffe, and topped up water to 11 oz.
I continued with Kodak Gold 200 which is a film I have very good experience with :
Time 18,5 minutes @ 20 centigrade, normal stop, fix and wash, ISO 200
I added one more teaspoon of coffe, and one pinch of Vit C and topped up water to 11 oz again.
I ended up with another Kodak Gold 200
Time 21 minutes @ 20 centigrade.
MY normal development time for Kodak Gold is 16 minutes which gives me quite dense and contrasty negatives. I have increased tiome from 15 minutes for this C41 film, since I found the negatives to be on the flat side.
So my normal development time for this C41 ISO 200 film would be:
16 min, 18,5 min, 21 min coffe and Vit C added as noted.
I incresed development time for the ISO 400 generic C41 film to 20 minutes and would have increased 15% for each sucessive film.
The results was so good it seems (film hang to dry now) that I wonder HOW many films is it possible to develop in one brew?
Totally I used 3 tsp, 1 pinch of soda, 2 tsp Vit C exactly, and 7 tsp, 1pinch coffe to develop 3 films, all seem a sucess, and I did this at a consderable saved cost.
I encourage other brave souls to give ths a try.
I will give examples of the picture qualøity of all these 3 films, hopefully tomorrow,.
Standard Ascorbate CH /CM chemistry
Water to 1000 ml
Soda 54 gram
Vit C 16 gram
Coffe 40 gram
(KBr 0,75 gram)
Mixed in the order given.
The measures for 320 ml
Water to 320 ml
Soda 17,3 gram
Vit C 5,1 gram
Coffe 12,8 gram
(KBr 0,26 gram)
Mixed in the order given
I did my usual measure with standard US measures as I weighed out :
Water to 11 US fl. oz.
Soda 3 teaspoon plus 1 pinch
Vit C 2 teaspoon minus 1 pinch
Coffe 7 teaspoon plus one pinch
(KBr 0,26 gram)
These volumetric measures given here are accurate to 0,05 gram
As I had the developer ready I started with a Generic brand 400 ISO C41 color negative film.
Time 21 minutes @ 20 centigrade, normal stop, fix and wash, ISO 400
I added one teaspoon of coffe, and topped up water to 11 oz.
I continued with Kodak Gold 200 which is a film I have very good experience with :
Time 18,5 minutes @ 20 centigrade, normal stop, fix and wash, ISO 200
I added one more teaspoon of coffe, and one pinch of Vit C and topped up water to 11 oz again.
I ended up with another Kodak Gold 200
Time 21 minutes @ 20 centigrade.
MY normal development time for Kodak Gold is 16 minutes which gives me quite dense and contrasty negatives. I have increased tiome from 15 minutes for this C41 film, since I found the negatives to be on the flat side.
So my normal development time for this C41 ISO 200 film would be:
16 min, 18,5 min, 21 min coffe and Vit C added as noted.
I incresed development time for the ISO 400 generic C41 film to 20 minutes and would have increased 15% for each sucessive film.
The results was so good it seems (film hang to dry now) that I wonder HOW many films is it possible to develop in one brew?
Totally I used 3 tsp, 1 pinch of soda, 2 tsp Vit C exactly, and 7 tsp, 1pinch coffe to develop 3 films, all seem a sucess, and I did this at a consderable saved cost.
I encourage other brave souls to give ths a try.
I will give examples of the picture qualøity of all these 3 films, hopefully tomorrow,.
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