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Crawley also notes the metol only FX-1 is not as good as the metol-glycin FX-2 in some respects:
"FX-2 gives a less evened-up picture-not so engraving like-with better retention of faint contrasts,and is also to be used as a stand developer;grain is a little finer....with no real fall off in sharpness and definition..."
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The variation of 7g glycin and 2g metol pH 7.5 might give more speed if there was some development in the first bath,eg increase the pH to activate the glycin.It has roughly the same ratio of glycin to metol as FX-2.
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Germain...
750cc water
7g metol
70g sodium sulfite
7g paraphenylenediamine
7g glycin
water to 1 liter
Use stock to develop film.
Some ridicule this formula and point to the Edwal formulae but this one really works...
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oh. you right - metol and glycin isn't superadditive. but still open question why Lowe mix metol with glycin at pH 7.4? from prev posted here graph glycin can't working at this pH!
 Originally Posted by Alan Johnson
The variation of 7g glycin and 2g metol pH 7.5 might give more speed if there was some development in the first bath,eg increase the pH to activate the glycin.It has roughly the same ratio of glycin to metol as FX-2.
this other way and I think that its not for two bath. may be for some stock dev like 7g glycin + 2g metol + kodalk + 30-50g sulfite
now I'm more interesting use glycin in superadditive combination. from theory must be additive:
1) glycin+pyrogallol
2) glycin+ascorbic acid
3) glycin+pyrocatechin
4) and of course glycin+hydroquinone
maybe (2) and (3) will be interesting at pH 9-9.5 (TEA/Kodalk).
glycin+phenidone isn't additive (from theory). but in russian community well known "phenyglin" formula as the best choice for push more than one stops:
Sodium Sulphite 90 grams
Sodium Carbonate 2 grams
Borax 2 grams
Glycin 5 grams
Phenidone 0.2 gram
Water 1000 ml
I found reference that this formula really from Ilford, but haven't name
Last edited by Relayer; 09-13-2011 at 05:29 PM. Click to view previous post history.
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wow! Anchell in "The darkroom cookbook" state that phenidone+glycin is superadditive (see p.47)
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Originally Posted by Relayer
wow! Anchell in "The darkroom cookbook" state that phenidone+glycin is superadditive (see p.47)
It was the basis of one of Ilfords developers, Ilfosol, but there's poor keeping qualities.
Ian
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Ian, see patent US3778267 - modified POTA developer with glycin. same state that phenidon+glycin make superadditivity combination
I haven't Mason, but found reference that:
at page 29 of Mason in which one of the developing agent is not of the dihydroxybenzene type, that is the case of the Phenidone/Glycin system
pls check this statement if possible
Last edited by Relayer; 09-15-2011 at 03:18 AM. Click to view previous post history.
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relayer
have you tried your glycin processed with it at 72ºF ( 22.2ºC )
you might find that it works better at warmer temps.
john
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I think that high temperature for bw processing isn't good idea. next step in 2bath experiment maybe phenidon+glycin "true 2bath" (no developing in bath A)
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Originally Posted by Relayer
I think that high temperature for bw processing isn't good idea. next step in 2bath experiment maybe phenidon+glycin "true 2bath" (no developing in bath A)
whatever works for you ...
i've used ansco 130 or its evil twin for film off and on since the mid 1990s
always at 72F ... never had trouble ..
( 72 really isn't a high temperature ... )
good luck !
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