Simon... Posted February 12, 2009 Share #1 Posted February 12, 2009 Advertisement (gone after registration) Hey everyone I'm use to using XTOL as my developer, but when I went to the store yesterday it was out of stock. So insted of XTOL i bought D-76. With XTOL I'm able to mix it at 20 degrees celcius, but with D-76 it says that I have to mix it at 50 degrees. I'm developing my film at 20 degrees so it's really easy with XTOL because it's 20 degrees right after I've mixed it. So my question is: Do I really have to wait for the developer to cool down from 50 degrees or can I just mix it at 20 like I'm use to with XTOL Link to post Share on other sites More sharing options...
Advertisement Posted February 12, 2009 Posted February 12, 2009 Hi Simon..., Take a look here Can't it be done quicker? - Mixing D-76. I'm sure you'll find what you were looking for!
H. James Wolf Posted February 12, 2009 Share #2 Posted February 12, 2009 D-76 includes Metol, which must be mixed in hotter water - recommended is 125 f. It will not completely dissolve in cooler water. Link to post Share on other sites More sharing options...
rob_x2004 Posted February 12, 2009 Share #3 Posted February 12, 2009 I'm developing my film at 20 degrees so it's really easy with XTOL because it's 20 degrees right after I've mixed it. So my question is: Do I really have to wait for the developer to cool down from 50 degrees or can I just mix it at 20 like I'm use to with XTOL You arent batching D76 immediately before you use it are you? You are making stock from the whole packet? Link to post Share on other sites More sharing options...
Simon... Posted February 12, 2009 Author Share #4 Posted February 12, 2009 Of course I'm makeing it all at once But I would just like if I could develop some films right away, after I've mixed the compound. But it seems that that isn't possible so I just need to wait for it to cool down... But thanks for the answers Link to post Share on other sites More sharing options...
rob_x2004 Posted February 12, 2009 Share #5 Posted February 12, 2009 I know its a tough ask to think ten minutes ahead. But you batched it four hours ago so I guess its cool now:p:D. Link to post Share on other sites More sharing options...
Simon... Posted February 12, 2009 Author Share #6 Posted February 12, 2009 Haha, I know But I haven't made it yet, I just wondered if I could do it all at once Link to post Share on other sites More sharing options...
rob_x2004 Posted February 12, 2009 Share #7 Posted February 12, 2009 Advertisement (gone after registration) I dont have any development times for anything over 30Centigrade but you could give it a go at fifty. Post the results here:rolleyes:. Link to post Share on other sites More sharing options...
Dan States Posted February 13, 2009 Share #8 Posted February 13, 2009 Use it 1-1 and drop in an ice cube as part of the dilution. Otherwise put what you are about to use in a jar and put it in the freezer for 10 minutes. If it gets too cold use the microwave to get it back to room temp. Link to post Share on other sites More sharing options...
buckhorn_cortez Posted February 13, 2009 Share #9 Posted February 13, 2009 Chemical reactions are either endothermic (absorbs energy - in this case heat); or exothermic (generates energy - in a chemical reaction, heat). The metol in D76 is endothermic and requires heat for the chemical reaction in water to create the chemical bonds in solution. Therefore, it won't easily go into solution (dissolve) without heat being available. Link to post Share on other sites More sharing options...
totst Posted March 11, 2009 Share #10 Posted March 11, 2009 Is it possible to mix the 415g powder into a concentrate, say 2 liter liquid? Then dilute at 1:1 for working solution. Thanks. Link to post Share on other sites More sharing options...
Finnkare Posted March 11, 2009 Share #11 Posted March 11, 2009 If you can and want to use it diluted, calculate the temperature of the "dilution water" with an equation. I did it with X-Tol once. If you wanna use the D-76 stock, you can put the container or bottle in a sink or in some other tray filled with cold water. Just keep an eye on the temperature, not that it's changing so rapidly though... Link to post Share on other sites More sharing options...
Finnkare Posted March 11, 2009 Share #12 Posted March 11, 2009 Is it possible to mix the 415g powder into a concentrate, say 2 liter liquid? Then dilute at 1:1 for working solution. Thanks. You could try at least. It would be quite a good idea. Of course there are limits on how much water is needed in order to get the whole substance diluted. That has to be checked from some chemistry source (not me:)). For me, it hasn't been that easy to mix the Perceptol and X-Tol powders in the recommended amount of water... I've had to stir it several minutes with a plastic rod to get all the crystals disappeared. Link to post Share on other sites More sharing options...
ddp Posted March 11, 2009 Share #13 Posted March 11, 2009 I used to pour the needed amount of D-76 into a steel tank, and then immerse it into a larger bowl or sink with ice cubes in water. I would keep a close eye on the temp in the D-76 and stir it as it cooled. This method worked great when a fresh batch was mixed and was quite hot. Link to post Share on other sites More sharing options...
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