If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
How much water in Kodalk?
"Larry" wrote in message ... hello all, am feeling a bit silly asking this question. When I mix Kodalk, can I place it in order in the formula with which I'm using it or should I make a stock solution of it to add to my formula? If I am making a stock solution, how much water using the one gram formula mentioned previously???? thanks again, Larry Kriese Look at the formula calling for Kodalk or for sodium metaborate. For each gram of Kodalk called for add 0.692 grams of borax and 0.145 grams of sodium hydroxide. If its more convenient you can mix the two in a small quantity of water and add the result to the formula. Since most photographic formulas call for less than the final quantity of water the "extra" water is accounted for when making up the final amount. Just make sure that the amount of water used for the Kodalk mixture is enough so that you will not wind up oversaturating it. Add the pre-dissolved Kodalk solution in the right order as called for in the formula. BTW, the order of solution is important: some chemicals will not dissolve in others, for instance Metol will not dissolve in concentrated solutions of sulfite, and some chemicals require the solution to be alkaline or acid to dissolve. Sodium hydroxide used to be easily available as Red Devil Lye in any grocery store but I have not seen it for some time. 20-Mule Team Borax is sufficiently pure for photographic uses. This also used to be available in any grocery store but, again, I have not seen it in local stores recently. Probably a web search would turn up sources. -- -- Richard Knoppow Los Angeles, CA, USA |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
The Kodalk recipe seems odd???? | Michael[_6_] | In The Darkroom | 1 | January 11th 09 07:10 PM |
The Kodalk recipe seems odd???? | Richard Knoppow | In The Darkroom | 0 | January 11th 09 06:35 PM |
Substitute for Kodalk? | Stefano Bramato | In The Darkroom | 29 | April 30th 05 07:46 PM |
How water resistant is a water resistant lens? | Derek Fountain | Digital Photography | 2 | March 18th 05 11:30 AM |
Municipal Water versus Well Water. | Gregory W Blank | In The Darkroom | 31 | November 27th 04 02:18 PM |