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> Extra-sharp version of D76/ID11 |
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Extra-sharp version of D76/ID11
I'm not sure where this one came from. I've had various bits of paper with formulae on for years and only recently got round to trying this:
Metol (Elon) = 5 grams Sodium sulphite, anhydrous = 125 grams Hydroquinone = 12.5 grams Sodium carbonate, anhydrous = 4 grams Sodium bicarbonate = 1 gram Water to make 1 litre. 'Dilute 1+4 and the developing agents will be the same as the classic D-76 (ID-11) formula when diluted 1+1, but with only half the sulphite content. The carbonate + bicarbonate buffered accelerator instead of borax seems to provide tight grain with good sharpness. Expose your films at box speed and start with the times given for D-76 and ID-11 when diluted 1+1 as a guide and adjust times if necessary to obtain the required contrast for your own preference.' I've used it for Delta 100, Delta 400 and HP5+, all at box speed. I found the times given by Ilford for normal ID11 (1+1), plus about 10% are about right for for me. I like what I get with it. The grain is slightly more prominent, but 'crisper', which I prefer. I suspect it won't last as well as standard ID11, due to the lower sulphite, but I usually mix it up fresh and use it straight away. Rob |
#2
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Thanks for that- I will try it next chemical mixing session!
__________________
Computerised and Slightly DIGITISED but FILM still RULES with ME ! |
#3
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This is an interesting variation that I would like to try. I have been brewing D-76 without hydroquione and getting a much longer shelf life for the stock solution. It may work here as well.
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Rob |
#5
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There is a link somewhere on the site where D-76H (metol only) was found to have much poorer keeping properties than regular D-76. There is also another variant of D-76H where the borax is replaced with kodalk (sodium metaborate) which also last better than D-76H. According to Geoffrey Crawley who did quite a lot of research into B&W film developers from the 1950`s onwards, developers which contain carbonate accelerators tend to produce crisper, sharper grain than those which contain borates. Rob`s experiments sound interesting. Last edited by Ag-Bromide; 5th June 2009 at 07:14 PM. |
#6
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I`m glad you are getting good results with it Rob. I made it as an alternative to the discontinued Paterson Acutol which I preferred to FX-39. |
#7
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The formula I've been using is:
Metol 2.50 g Sodium Sulfite 100.00 g Borax 2.00 g I got it from APUG and have experienced its' longevity first hand. Also it can be found in the Anchell COOKBOOK as D-76H with a thanks to Grant Haist. |
#8
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I tried this formula -- the Sodium Bicarbonate I had looked a bit 'old' but dissolved and got some good negatives-- next time I looked at the bottle there were lots of crystals in the bottom-- not sure what had crystallized out !
__________________
Computerised and Slightly DIGITISED but FILM still RULES with ME ! |
#9
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Rob,
You say the grain is slightly more prominent but crisper than normal D76 1+1. This is more or less what I get when I use D76 at 1+3. Slightly more grain, noticably more sharpness.. But the development times are quite a lot longer, of course, and you report only slightly longer times. Alan |
#10
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Quote:
Rob |
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