I have wondered ever since A & H quit selling the old washing soda that we used for cleaning radiators, etc, which was Na2CO3 + 10 H2O, why it is now claimed to be the monohydrate in its resurrected form. The CRC Handbook says that the decahydrate is washing soda. I have not been able to get the A & H Washing Soda, so cannot test it. It is easier for me to get the pHPlus for adjusting pH of swimming pools. It is close enough to anhydrous for government work. In any case, as long as you know what you have, you can use more or less than the recipe calls for. In a developer like Ansco 130 or D-72, you will probably not notice the difference between anhydrous and monohydrated, but will see a difference between monohydrated and the true washing soda, as the ratio of molecular weights is 2.31. You need 2.31 times the weight of what CRC calls washing soda as of monohydrated sodium carbonate. The difference is water, of course.
I recently decided to try some warmtone papers and so, along with this I would like to try Ansco 130 developer. I was looking at what is needed to make it my self and I have most of what I need. The Darkroom Cookbook formula for Ansco 130 calls for Sodium Carbonate, monohydrate. It also says, under the description for sodium carbonate that most of the time a balanced Alkali (ieKodalk) can be used for carbonate. So before I buy Sodium Carbonate, monohydrate I was wondering,
Could Sodium Metaborate (Kodalk balancd Alkali) be used instead of Sodium Carbonate, monohydrate in the formula for Ansco 130?
This is all new to me so I hope this question is understandable!
(I did a search and could not find this information in the archives!)
Many thanks!
Nancy
As a side thought is Glycin always so costly?
Most of the time, sodium metaborate can
not be substituted for sodium carbonate.
I think you have that backwards. The monohydrate is the most stable. Leaving either the decahydrate or the anhydrous open to air will eventually lead to the monohydrate. You could heat the decahydrate to anhydrous state, but that's a waste of power when you can more easily use 2.3 times as much. For some reason, I have not been able to get the washing soda locally.I've used Arm & Hammer Washing Soda (yellow box in your supermarket household cleaner/laundry detergent section) in Ansco 125 and 130 with perfect results. In fact I use it for all my paper developers, and in my experience there is no practical difference between the monohydrate and decahydrate versions. If you leave the monohydrate version exposed to air (after you open it) it will eventually turn into the decahydrate version anyway.
pH Plus, available at swimming pool stores will work well too. Same stuff basically.
Larry
There are many errors and misconceptions in the Anchell books. Whenever possible I would suggest going back to the original source before making and using a formula.The Darkroom Cookbook ...
I store my Glycin in the freezer with my films and papers. There it keeps for many months.
Arm and Hammer washing soda is 100% sodium carb and it is about 3 dollars for 2 lbs at the grocery story in the area where the clothes washing soap is. Yellow box.
lee\c
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