Thursday, November 2, 2017

Turning it easier

In the last post, I spoke about Bill Williams color developer, as he proposed it.

To mix all components, one by one, each time you want to develop a film, is not that practical. Besides, with those 10% or 1% solutions you have to measure different amounts of each. I thought it would be easier to have only two prepared stock solutions and use equal amounts of them, just like a commercial developer.

So, here is my proposal for an easier usage of Bill Williams developer:

Stock solution A, for 500 ml

25g Sodium Sulfite
20g CD4 *

Stock solution B, for 500 ml

12,5g Potassium Bromide
0,1g Potassium Iodide
200g Potassium Carbonate

* The resulting amount in the work solution is slightly higher, 0,4g against 0,35g


Put 10ml of each solutions A and B in 500ml hot water from tap (+/- 50ºC), mix and let it cool to 45ºC (112ºF). Pour the solution into the tank, where the film was previously loaded. Gently and constant agitation during 8 minutes. Then rinse, followed by bleach, rinse, fix and wash, as usual.


J. M. Golding said...

As always, thank you for your pinoeering work!

Henrique Sousa said...

Thanks! You are welcome!

vourmat said...
this is my blog on experiments true in Russian. Here is ORWO UT18 protsnssom E-6

Henrique Sousa said...

Thank you Vladimir!
Your blog will be added to my favorites!

tcdp said...

Hi, Is CD4 any toxic? How do you handle it? Using gloves and dust filter mask?

Henrique Sousa said...

Yes, when handling it as powder.