Archived posting to the Leica Users Group, 2017/06/15
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Also, the fact that two separate chemicals are both called Pyro The first one Pyrocatechol Catechol also goes by 1,2-Dihydroxybenzene and Pyrocatechin also 1,2-Benenediol. And gets called Pyro but not by the people you should be listening too. The second Pyrogallol also goes by 1,2,3-Trihydroxybenzene also just called Pyro and called Pyrogallic Acid. I get them confused for some reason. But the second one is the one we should be calling Pyro. the first one ?Catechol? was the bomb blast one making for highly extended tonal range you could shoot a row of lightbulbs and see the filaments and read ?GE?, ?Phillips?. Its formula was wrongly published in Ansel Adams photo series with a decimal point in the wrong place making for lots of not happy photogs who risked their lives shooting atomic bomb tests or very hot lightbulbs. PMK is one of the only ways to make Pyro consistent using a second developing agent: Metol. When used in its traditional formulas you never know how your negs are going to look no matter what you did. Even after looking at them. They printed way different that they looked like they were going to print. You?d try the 4 grade contrast put it would need the 2. And so on. If your breath the powder, it?s all over. And if you take your rubber gloves off which you always for sure wear and there is pyro on the gloves and you touch the pyro it?s all over. Other than that, it?s just great. I passed on it. -- Mark William Rabiner Photographer On 6/14/17, 4:41 PM, "LUG on behalf of Christopher Crawford" <lug-bounces+mark=rabinergroup.com at leica-users.org on behalf of chris at chriscrawfordphoto.com> wrote: You can?t really say ?Pyro? is ?Good? or ?Bad? because there are a bunch of pyro-based developers out there. I use PMK and with most of the films I have used it with, the tonality is gorgeous. Ilford FP4 and HP5 are my favorites, but I have gotten great results with Tmax 100, Tmax 400, and Fuji Acros. There are modern Pyro developers that have been designed for modern films, like PMK and Pyrocat. Older ones don?t work well with modern films, and that may be why you don?t think highly of Pyro. I?m not doing stand developing. PMK won?t work for that, it needs frequent agitation or it gives streaks and uneven developing. Here?s some examples: FP4 in PMK: http://chriscrawfordphoto.com/chris-details.php?product=1758 http://chriscrawfordphoto.com/chris-details.php?product=1628 http://chriscrawfordphoto.com/chris-details.php?product=1575 http://chriscrawfordphoto.com/chris-details.php?product=2029 HP5 in PMK: http://chriscrawfordphoto.com/chris-details.php?product=1824 http://chriscrawfordphoto.com/chris-details.php?product=1866 http://chriscrawfordphoto.com/chris-details.php?product=1756 http://chriscrawfordphoto.com/chris-details.php?product=1757 Pan-F in PMK: http://chriscrawfordphoto.com/chris-details.php?product=1645 -- Chris Crawford Fine Art Photography Fort Wayne, Indiana 260-437-8990 http://www.chriscrawfordphoto.com My portfolio http://www.facebook.com/pages/Christopher-Crawford/48229272798 Become a fan on Facebook On 6/14/17, 2:32 PM, "LUG on behalf of lluisripollphotography" <lug-bounces+chris=chriscrawfordphoto.com at leica-users.org on behalf of lluisripollphotography at gmail.com> wrote: >George, > >Your comment is very interesting for me, I?ve never developed with Pyro >for myself but I?ve worked with negatives developed in Pyro, grain and >fine structures are very fine but I think that the tonality gradation is >poor, it offers a great and nice contrast from Black to White but a >certain lack of gradation. I know some ones has employed it successful >with semi-stand development and a long time with very slow agitation. I >would appreciate very much your experience and comments about, thank you! > >Cheers >Lluis > > > > > > >> El 14 juny 2017, a les 16:00, George Lottermoser >><george.imagist at icloud.com> va escriure: >> >> >>> On Jun 14, 2017, at 5:05 AM, Gerry Walden <gwpics at me.com> wrote: >>> >>> I don?t want to start and wars here, and I know this is a minefield in >>>which I will get a thousand and one answers, but is there any consensus >>>of opinion these days on a one-shot b&w developer? >>> >>> Insanely I am thinking of doing my own processing of film again. >> >> If you?ve never played with Pyro? you owe it to yourself to do so. >> A true difference in "edge." >> >> fond regards, >> >> George >> >> http://www.imagist.com/blog >> http://www.imagist.com >> http://www.linkedin.com/imagist >> >> >> >> >> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information > > >_______________________________________________ >Leica Users Group. >See http://leica-users.org/mailman/listinfo/lug for more information _______________________________________________ Leica Users Group. 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