hearkane - http://flickr.com/arkane
Equipment, Photo, Technical
2010-09-27 (Monday, week 39) at 18:39
Rätt denna gång. Men om jag inte missminner mig så är citronsyra och askorbinsyra samma sak! Sorry!
2010-09-27 (Monday, week 39) at 18:56
Jag har fel!!! Citronsyra och askorbinsyra är INTE samma sak! :D
2010-09-28 (Tuesday, week 39) at 18:43
Precis, det Askorbinsyra == C_vitamin.
Citronsyra ska funka på samma sätt som “KBr”, om man tillsätter 2.8g/l, Kika på receptet från blogspot.
2010-09-28 (Tuesday, week 39) at 18:46
Vadå KBr? Å vadå Askorbinsyra==C_vitamin?
Kan du förklara på svenska, inte kemiska, så alla förstår! :)
2010-09-29 (Wednesday, week 39) at 17:17
Om du läser receptet du visade mig så ser du “C-vitamin” (= samma sak som Askorbinsyra)
respektive “KBr” (vid “Potassium Bromide”).
Citronsyra ska ge samma effekt som “KBr” (som är betydligt svårare att få tag på!).
2010-10-09 (Saturday, week 40) at 10:08
2010-10-10 (Sunday, week 40) at 20:10
2010-10-10 (Sunday, week 40) at 20:13
2010-10-29 (Friday, week 43) at 14:49
http://ars-photographica.weebly.com/caffenol.html – printing, putting photos on paper using Caffenol
2011-03-13 (Sunday, week 10) at 17:35
http://www.flickr.com/groups/33051635@N00/discuss/72157625954289457/ – how much water is there in that washing soda?
2011-03-13 (Sunday, week 10) at 17:46
2011-03-13 (Sunday, week 10) at 18:18
Another recipe: http://www.caffenol.org/2011/01/09/the-delta-recipe-goes-standard/
2011-03-16 (Wednesday, week 11) at 20:15
Now it seems verified:
… states that Citric Acid (C6H8O7) in double dose compared to Potassium Bromide (KBr) makes about the same effect as KBr.
The C-M recipe adjusted for 300 ml water (3/10 L, for one 35mm film in my paterson tank)
16.2 g washing soda
4.8 g vitamin C (ascorbic acid)
12 g instant coffe
C-H adds 3/10ths (0.3) gram of KBr,
replacing Kbr with Citric acid means 6/10ths (0.6) of a gram.
C-L recipe for 300 ml becomes:
4.8g Washing soda
3g vitamin C
0.6 to 1.2 g Citric acid
12 g instant coffe
Now, for Tri-X 400 there seems to be another necessary adjustment, from C-M
described here: http://www.flickr.com/groups/33051635@N00/discuss/72157625937412517/72157626095106638/
… and that is; use just 1/4 amount of the instant coffe.
Base recipes show here are from
more on caffenol here:
(edit: 2011-03-19, corrected values and additional info)
2011-05-24 (Tuesday, week 21) at 18:57
Using household Salt (NaCl) in iodizied version seems to be an alternative to Potassium Bromide (KBr)
> 7g/liter instead of KBr.
2011-03-30 (Wednesday, week 13) at 17:42
A comment written elsewhere:
>> BUT i was wondering how the coffee development turns out??
From what I have read, and my own limited experience, Ilford films appear to work well in Caffenol.
Note that Kentmere is a Ilford “subsidary” ;-) – and I can confirm at least Kentmere *400* to give nice results. Kodak Tmax 400 on the other hand does less well. It does work to scan though, but the result might not be as pleasing as Kentmere.
There is a lot of discussion at least in those groups where I read, which must be taken as a joyful part of using Caffenol – you can try to adapt it to your own needs and wishes.
>> is it easy?
After mixing the chemicals in the specified order – just take your time, don’t hurry – the process is exactly the same.
>> is it cheaper than using the real chemicals??
It really depends on what you compare to.
Buy one bottle of 250ml “Fomadon R09” (developer, 9€) and use 3 to 9ml per film you develop (allows 25 to 75 films to be developed), depending on how you wish to do it.
(9ml: 0.36€/film, 3ml:0.12€/film)
You’re hardly going to find a cheaper alternative . Not Caffenol at least.
For Caffenol you need, with approximate prices I have in my head right now:
5€, Washing soda (750 grams, ~15 liters)
5€, Ascorbic acid (90 grams, ~6 liters )
5€, Instant coffe (200 grams, ~5 liters)
… the liter volumes is an estimated total amount of Caffenol-C-M developer you can make out of it.
In my development tank I need about 0.3 liter for each film, so 15 liters covers 15/0.3 = 50 films. For 15 liters and thus 50 films out of ascorbic acid above you need 2.5*5€ = 12.5€ , and 3*5€ of coffe… That makes a sum of 5+12.5+15 = 32.5€ per 50 films with my estimated prices.
32.5/50 = 65/100 = 0.65 per film =)
2011-03-30 (Wednesday, week 13) at 18:16
2011-05-20 (Friday, week 20) at 21:04
More reading, usefulness? Not sure there….
2011-06-06 (Monday, week 23) at 17:57
“… anti chlor for swimming pools : it’s 99% sodium thiosulfate. (I add some sulphites and metabisulphites). “
2011-06-06 (Monday, week 23) at 17:59
2011-07-30 (Saturday, week 30) at 22:25
New findings on recipe, great results:
2011-09-19 (Monday, week 38) at 21:47
The easy way to use Caffenol
2012-04-17 (Tuesday, week 16) at 19:50
Cheap version Caffenol:
2012-08-16 (Thursday, week 33) at 14:09
A new degree of Caffenol.
2013-02-15 (Friday, week 07) at 15:21
On the longevity of Caffenol
2013-12-22 (Sunday, week 51) at 09:19
Sodium Carbonate, Na2CO3,
= Natriumkarbonat (obs EJ samma som Natrium-BI-karbonat)
Note THIS IS NOT Sodiumbisulfate – and therefore not to useful for e.g. D23
http://sv.wikipedia.org/wiki/Natriumv%C3%A4tesulfat, NaHSO4 <- NOT what we want
http://en.wikipedia.org/wiki/Sodium_bisulfate, NaHSO4 <- NOT what we want
http://en.wikipedia.org/wiki/Sodium_sulfite, Na2SO3 <- what we want
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