Archived posting to the Leica Users Group, 2011/07/25
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Yes the stuff which goes on with a stained neg in an enlarger with hopefully a cold light head projected onto a sheet of photo paper in the darkroom has some conjecture involved. It works out extremely well I don't think anyone really knows for sure why. I would guess in a scanner this would not translate directly at all. One could scan your darkroom print and I'd think that could make for that kind of translation. Not sure what the consensus has gotten to be on scanning prints vs. negs but I've for sure veered away from it. Mark William Rabiner > From: Christopher Saganich <csaganich at gmail.com> > Reply-To: Leica Users Group <lug at leica-users.org> > Date: Mon, 25 Jul 2011 17:33:16 -0400 > To: Leica Users Group <lug at leica-users.org> > Subject: Re: [Leica] 2 bath Pyrocat-HD > > The Pyrocat HD will be both sharp (as sharp as a typical D76 type > developer) and very smooth. especially in the clouds, in fact if I shot clouds > allot I would only use it. I have no grain issues even for TriX, looking at a > 16x20 print next to me developed in Pyrocat HD I see little to no grain at > a normal viewing distance. It's even better with slower speed films. Scanning > Pyrocat HD film may be different due to the stain as it is colored. The > advice is to scan RGB and convert, I don't remember how important this was to > the final image. On Mon, Jul 25, 2011 at 5:14 PM, Mark Rabiner > <mark at rabinergroup.com> wrote: > I do think the streaking from intermittent > agitation occurs during the time > the tank is sitting there in between > cycles. When that time is extended > past > two or three minutes you have some > real danger of streaking depending on > the > formula and the water and > serendipity. It can become a bit of a crap shoot > as you can get no streaking > for months but when you get back from a > critical > shoot there it is. > Most > developing formulas can be made into a two bath by simply taking the > alkali > out of the formula and then using it as a second bath. > So if I was d 76 you > don't add the 2 grams of Borax you make a second bath > out of it and that's > when most of the development would supposedly take > place. > > I also think > once you take a developer to its highest or very high dilution > like Microdol > X 1:3 it will show no need for divided development and will > have plenty of > sharpness and compensation. This because of the lower > sulfite > in play but > also for the edge effects from the lower developing (reducing) > agents. And > at one minutes agitation intervals. Maybe two. When you have > extended > developing times like you get with Microdol X 1:3 that seems to be > a key > factor in having the kind of neg we want. > And I really wonder how different > our approach should be when we are making > neg for the darkroom vs. the > scanner. > > Mark William Rabiner > > > > From: Christopher Saganich > <csaganich at gmail.com> > > Reply-To: Leica Users Group <lug at leica-users.org> > > > Date: Mon, 25 Jul 2011 12:27:50 -0400 > > To: Leica Users Group > <lug at leica-users.org> > > Subject: Re: [Leica] 2 bath Pyrocat-HD > > > > > Pyrocat is not a two bath, but you probably know that. My times and temps> > > > are as follows: > > > > FP4 35mm @ ASA 100: 2:2:100 (5ml A, 5ml B) 500ml > total volume. 10 > minutes, > > 20C, Normal agitation of 10 seconds every 60 > seconds. This is the > minimum > > dilution for a roll, so don't use a single > roll tank and double the > > dilution. If using density meter the blue > channel will give most > accurate > > results due to the stain. > > > > KB100 > 120mm @ ASA 50 or 64: 2:2:100, 11 minutes, 22C, low agitation 10 > > seconds > every 3 minutes. I used this time/agitation for highlight > > compensation, > density of 1.27 above fog for zone VIII. Increase > agitation > > to normal > and drop the time by 2 or 3 minutes for same ASA. Pyrocat will > > hold dense > highlights, it's what is is known for. > > > > To avoid streaking and uneven > development don't twist during agitation, > > streaking happens with twisting > motion on SS reels rather then the amount > of > > agitation, or perhaps one > modifies the other, Anyway I found a definite > > correlation with twisting > and uneven development; streaking may be a > > different animal altogether. > > > > > Chris > > > > > > > > > > On Mon, Jul 25, 2011 at 11:16 AM, Paul Roark > <roark.paul at gmail.com> > wrote: > > > >> On Mon, Jul 25, 2011 at 7:37 AM, > Richard Wasserman > >> <disfromage at ameritech.net> wrote: > >>> ... I use > reduced agitation?... which increases edge effects ... > >> > >> FWIW, my > standard development procedures when I was using the Rollei > >> SL66 with > Tmax 100 was to use dilute (1:3) Microdol-X with agitation > >> at 3 minute > intervals. The infrequent agitation gave great sharpness, > >> which was a > real plus with the enlarger, but it has turned out to be a > >> mistake with > digital tools when these negatives are scanned and > >> printed today. I find > it much easier to sharpen in Photoshop than to > >> reduce the grain (and > local unevenness) caused by the infrequent > >> agitation. If I were to go > back to shooting the SL66 and Tmax 100, > >> I'd look at developers that gave > me maximum smoothness and leave the > >> sharpening to PS, where I can do it > locally as opposed to globally. > >> > >> Paul > >> www.PaulRoark.com > >> > > >> _______________________________________________ > >> Leica Users Group. > > >> See http://leica-users.org/mailman/listinfo/lug for more information > >> > > > > > > > > > -- > > Chris Saganich > > www.imagebrooklyn.com > > > > > _______________________________________________ > > 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 > -- > Chris > Saganich www.imagebrooklyn.com ______________________________________________ > _ Leica Users Group. See http://leica-users.org/mailman/listinfo/lug for more > information