Stealth3kpl Posted June 26, 2011 Share #1 Posted June 26, 2011 Advertisement (gone after registration) I've read (I think) that after mixing D76 it is best to let it mature for 24Hrs before use. Is this hearsay? Pete Link to post Share on other sites More sharing options...
Advertisement Posted June 26, 2011 Posted June 26, 2011 Hi Stealth3kpl, Take a look here Maturing D76. I'm sure you'll find what you were looking for!
too old to care Posted June 26, 2011 Share #2 Posted June 26, 2011 Since I mix mine hot, I have to let it sit for several hours to bring to room temperature. Also, it seems that it does not fully mix, even when hot and takes those hours to fully dissolve. After several hours it works just fine and there is no more power in the bottom of the container. Wayne Link to post Share on other sites More sharing options...
Xmas Posted June 26, 2011 Share #3 Posted June 26, 2011 A two pack Kodak kit does not allow what you would do with raw chemicals, of a pinch of preservatibe then metol stir rest of preservative. But that may be rumor as well. Metol is not very soluble in water. Mix up your own clone using Phenodine with Metol weight /10 or near. No dermatitis risk. Noel Link to post Share on other sites More sharing options...
250swb Posted June 26, 2011 Share #4 Posted June 26, 2011 I've read (I think) that after mixing D76 it is best to let it mature for 24Hrs before use. Is this hearsay?Pete It is probably very good advice if you haven't mixed it properly, less likely with small amounts, but some advice may be aimed at deep tank quantities of the stuff. A good lab technician should have no problem though. Steve Link to post Share on other sites More sharing options...
tobey bilek Posted June 27, 2011 Share #5 Posted June 27, 2011 I cooled some with ice cubes once. It was a disaster in big letters. Natural cooling is best. 24 vs 8 hours? I would have to test, but I know 24 works. I put some food wrap on the surface of the fresh mix D76, wait 4 to 6 hours and then decant into small one time use bottles, 4 oz for me. It is good for 6 months, then deterioration starts setting in, slowly at first. I have run these tests very carefully. Never ever let a partially full bottle set and reuse the balance. Link to post Share on other sites More sharing options...
underground Posted June 27, 2011 Share #6 Posted June 27, 2011 Since I mix mine hot, I have to let it sit for several hours to bring to room temperature. Also, it seems that it does not fully mix, even when hot and takes those hours to fully dissolve. After several hours it works just fine and there is no more power in the bottom of the container. Wayne Same, I found agitating often when still warm does'nt really help a whole lot. Check it for floaties in the bottle. you should'nt have any when its ready. If you agitate before you check you might just have air bubbles. check it without shaking it after several hours. I do well with D-76. I like it. Link to post Share on other sites More sharing options...
fotohuis Posted June 29, 2011 Share #7 Posted June 29, 2011 Advertisement (gone after registration) It takes more hours to dissolve it completely and it takes some time for the buffer to stabilize on then end value of pH. So it's a good idea not to use it immediately. Link to post Share on other sites More sharing options...
pico Posted June 30, 2011 Share #8 Posted June 30, 2011 I've read (I think) that after mixing D76 it is best to let it mature for 24Hrs before use. Is this hearsay?Pete No. It is good advice. I've collaborated with a number of photographers who have found cases where fresh D76 has exacerbated over development at the edges of roll film with normal agitation. Myself included. Link to post Share on other sites More sharing options...
adan Posted June 30, 2011 Share #9 Posted June 30, 2011 Not exactly "maturing" - but Gene Smith used to mix in a little "old" D-76 when preparing a new batch. He thought it kept the grain down. Link to post Share on other sites More sharing options...
tobey bilek Posted June 30, 2011 Share #10 Posted June 30, 2011 Mix old and new, sometimes called seasoning, will keep grain small. The other way is to develop some scrap film in it. This only works if you develop in stock, not diluted, and as you develop more and more the time needs extending or you need to add replenisher. All this works nicely in a commercial lab where they run control strips and check with a densitometer. I recommend one shot for home use. Link to post Share on other sites More sharing options...
Xmas Posted July 1, 2011 Share #11 Posted July 1, 2011 Hi It is difficult to repeat arbitary processes, if you need fine grain use stock, if you need sharp use 1:3. If you want economy Rodinal at 1:100. if you want finer grain still one of the slows speed but shrinks the grain developer. If you 'roll your own' D76 use more solvent... Eye of sheep, leg of toad... Noel Link to post Share on other sites More sharing options...
Stealth3kpl Posted July 3, 2011 Author Share #12 Posted July 3, 2011 Ok, I've mixed it at 55C and it all seemed to dissolve. I've put it in a plastic concertina bottle. Should I have waited for it to cool first? Pete Link to post Share on other sites More sharing options...
fotohuis Posted July 3, 2011 Share #13 Posted July 3, 2011 If it's completely dissolved it's not a problem. Just wait 12 hours before using it for the first time. Link to post Share on other sites More sharing options...
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