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caffenol

Anonymous Sun 19 Mar 2017 13:29:13 No.3042179 View View Reply Original Report

Quoted By: >>3042199 >>3042203 >>3042204

Hi /p/ !
I would like to make a caffenol recipe for films, as I have few days to kill...
I found a receipe with baking soda but it doesn't work.

What I have here is :
-caustic soda
-baking soda
-sodium sulfite
-coffee
-vitamin C pure

Do you know any recipe with this ? Can't find washing soda in my town...

bsti

bsti Sun 19 Mar 2017 14:41:11 No.3042199 Report

Quoted By: >>3042201

>>3042179
ask at a pharmacy.. they usually have it
or
heat your baking soda to 200°C[400°K] to turn it into washing soda..

Anonymous

Anonymous Sun 19 Mar 2017 14:54:44 No.3042201 Report

Quoted By: >>3042250

>>3042199
Really ? Washing soda ? Are you sure about that ? Sounds really strange to me... One recipe is kind of working, and I'm trying to improve it with sodium silicate found washing powder. Hope it'll be the same reaction as washing soda.

!kurwaRB7YU

!kurwaRB7YU Sun 19 Mar 2017 14:59:30 No.3042203 Report

Quoted By: >>3042211

>>3042179
Give me the volume of your dev tank and the film you want to develop in it and I'll recalculate my recipe for you. Also, what kind of coffee and how fresh is the ascorbic acid?

Anonymous

Anonymous Sun 19 Mar 2017 15:02:49 No.3042204 Report

Quoted By: >>3042209

>>3042179
What is the look that caffenol gives you like?

!kurwaRB7YU

View Same Google ImgOps iqdb SauceNAO 32.jpg, 4MiB, 3476x2261

!kurwaRB7YU Sun 19 Mar 2017 15:10:54 No.3042209 Report

Quoted By:

>>3042204
brown-stained negatives with relatively fine grain. This is an Ilford Pan 400 scan

Anonymous

Anonymous Sun 19 Mar 2017 15:11:20 No.3042211 Report

Quoted By: >>3042213

>>3042203
I have few tanks, so 1l would be great :-)
and the ascorbic acid is pure (said the pharmacy girl), so I guess 99.9% and effervescent.

!kurwaRB7YU

!kurwaRB7YU Sun 19 Mar 2017 15:14:47 No.3042213 Report

Quoted By:

>>3042211
the working solution deteriorates and stops worki g very quickly. you always have to mix up your working solution from powders just before dev. that's why I asked for the final tank volume, unless you're okay recalculating from 1l

!kurwaRB7YU

!kurwaRB7YU Sun 19 Mar 2017 15:26:10 No.3042223 Report

Quoted By: >>3042229 >>3042240 >>3042801

For 1l:
NaOH(caustic soda) 7.78g
NaHCO3(baking soda) 16.3g
Vit. C 20g
Instant coffee 45g

Add to 850ml of distilled water in order given above mixing until every ingredient fully dissolves before adding the next one. Top off to 1l. Use freshly mixed.

For 400 speed classic emulsions at 23°C develop 14.5min with normal agitation scheme. Don't use stop bath, rinse extremely well, the more you rinse, the less stained the negs will be. Fun fact, you can test rinsing progress by tasting the rinse water. Fix normally.

!kurwaRB7YU

!kurwaRB7YU Sun 19 Mar 2017 15:28:17 No.3042226 Report

Quoted By:

Right, forgot to add, mixing lye and baking soda in the correct stechiometric proportions basically gives you the same ionic solution makeup as washing soda, skipping the tedious heating/dehydrating baking soda step entirely.

Anonymous

Anonymous Sun 19 Mar 2017 15:31:01 No.3042229 Report

Quoted By: >>3042233 >>3042236

>>3042223

How long should the development time be for 1600?

!kurwaRB7YU

!kurwaRB7YU Sun 19 Mar 2017 15:36:49 No.3042233 Report

Quoted By:

>>3042229
no clue. it's the "caffenol delta STD" recipe, there's a ton of dev times online, do your own homework here.

!kurwaRB7YU

!kurwaRB7YU Sun 19 Mar 2017 15:39:20 No.3042236 Report

Quoted By:

>>3042229 #
no clue. it's the "caffenol delta STD" recipe, there's a ton of dev times online, do your own homework here. It's an awful developer to push with though, it barely gets decent results at box speed.

Anonymous

Anonymous Sun 19 Mar 2017 15:43:18 No.3042240 Report

Quoted By:

>>3042223
wow, this is super cool ! Thanks a lot !!

bsti

bsti Sun 19 Mar 2017 16:14:25 No.3042250 Report

Quoted By:

>>3042201

cause baking soda (NaHCO3) is water free soda ash or washing soda (Na2CO3)

Anonymous

Anonymous Sun 19 Mar 2017 20:20:22 No.3042334 Report

Quoted By: >>3042338

OP here.
Question : can anyone tell me why we always add Coffee ? What is the chemical used here ?

Anonymous

View Same Google ImgOps iqdb SauceNAO sfmoma-hcb-07-sumatra-1950.jpg, 331KiB, 817x550

Anonymous Sun 19 Mar 2017 20:26:01 No.3042338 Report

Quoted By: >>3042345

>>3042334
http://caffenol.blogspot.no/2010/03/caffenol-c-m-recipe.html

>The active substance in coffee is caffeic acid, that behaves similar to pyrogallol and is a very compensating developing agent.

Anonymous

Anonymous Sun 19 Mar 2017 20:42:59 No.3042345 Report

Quoted By:

>>3042338
Awesome. Just read about a guy who had the same idea I had : he replaced instant coffee with salvia (both had caffeic acid). The idea is not having the brown filter on your film. Love this idea, will try it tomorrow, and I think salvia is cheaper than coffee.

Anonymous

Anonymous Mon 20 Mar 2017 13:52:22 No.3042801 Report

Quoted By: >>3042810

>>3042223
Man, I just tested your recipe and it's working fucking fine :-) doing another roll of 12 pictures right now, pictures on it's way.

!kurwaRB7YU

!kurwaRB7YU Mon 20 Mar 2017 14:14:02 No.3042810 Report

Quoted By: >>3042819 >>3042858 >>3042861

>>3042801
Looking forward to the photos! Honestly, I think it's very imperfect and inefficient with the ingredients but given the price and ease of diy rodinal I don't bother with caffenol anymore. Would rather use that vitamin C for diy xtol instead.

Anonymous

Anonymous Mon 20 Mar 2017 14:33:07 No.3042819 Report

Quoted By: >>3042981

>>3042810
I already ordered sodium sulfite, and I'm doing DIY rodinal asap. But caffenol is fun. Really imperfect, but fun. Not gonna replace my Xtol with this...

Anonymous

View Same Google ImgOps iqdb SauceNAO img902.jpg, 140KiB, 1059x1663

Anonymous Mon 20 Mar 2017 15:36:41 No.3042858 Report

Quoted By: >>3042861 >>3042981

>>3042810

Anonymous

View Same Google ImgOps iqdb SauceNAO img903.jpg, 224KiB, 1643x1059

Anonymous Mon 20 Mar 2017 15:40:38 No.3042861 Report

Quoted By:

>>3042858
>>3042810
As I said. Not the best developper, but that's funny. I think I'm done with it, looking for the rodinal which seems fun and doing excellent job.

!kurwaRB7YU

View Same Google ImgOps iqdb SauceNAO 2015-11-13 18.41.55.jpg, 46KiB, 352x288

!kurwaRB7YU Mon 20 Mar 2017 19:50:54 No.3042981 Report

Quoted By:

>>3042858
>>3042819

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