Archived posting to the Leica Users Group, 2005/03/25
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I'm printing those jazz pictures today, so I'll see how those negatives do in what is still my real world, the darkroom. I was pleased that they scanned so well, though... Your sunlight/Christo pictures seem to be right on with lots of what I try to get in sunlit shadows. Incidentally, the girl getting married pictures I posted earlier this week were also the 800/11 min 75 degrees. You also probably have noticed that my mixing ratios (1/2 ounce syrup/water to make 1 litre) is also somewhat bastardized, but it is my routine ratio... Also, inspired by your Flying Saucer Cafe picture, I tried selenium toning, but got no color shift on Polymax Fine Art. Today I am going to print some Ilford Warmtone to see what happens. bill ----- Original Message ----- From: "Saganich, Christopher/Medical Physics" <saganicc@mskcc.org> To: "Leica Users Group" <lug@leica-users.org> Sent: Friday, March 25, 2005 11:36 AM Subject: RE: [Leica] bill dilution H. > The low light shots are right on as far as exposure and development goes, > which is why I wanted to find out your process. I also do a lot of low > light shooting but haven't managed too well at asa 100 in low contrast > situations. When I saw your process time and temp I was impressed I > suppose I'm timid when it comes to pushing film. According to your > results I'll run triX at 800, 75F but use my dilution 12:500 and adjust > the time down to 6.5 minutes. > > Christopher Saganich > > -----Original Message----- > From: lug-bounces+saganicc=mskcc.org@leica-users.org > [mailto:lug-bounces+saganicc=mskcc.org@leica-users.org] On Behalf Of bill > harting > Sent: Thursday, March 24, 2005 10:19 PM > To: Leica Users Group > Subject: Re: [Leica] bill dilution H. > > Thank you, Chris. After replying earlier I went to look at your webpage > and > saw all the detail you had about various HC110 dilutions and densities. > All > I have is a composition book with notes to add a minute or take a minute > away. Almost all of my shooting is low light, so I am more interested in > pushing a little rather than dealing with sunlight and shadow. One example > is > http://gallery.leica-users.org/album15/Eastham_copy > in which I use my regular sunlight speed of about 250 for Tri X, the same > rating I use for studio/strobe stuff. I am trying to digest all that > you've > written. I recall Daniel's note about the dilution/contrast link, but have > not pursued it. > > And I'll pay more attention. > > bill h > > > ----- Original Message ----- > From: "Saganich, Christopher/Medical Physics" <saganicc@mskcc.org> > To: "Leica Users Group" <lug@leica-users.org> > Sent: Thursday, March 24, 2005 6:55 PM > Subject: RE: [Leica] bill dilution H. > > >> Thanks Bill, >> >> I tested some triX last year in dilution H. I found ASA 160 to be optimal >> for this dilution if you want good shadow detail, but ASA 320 was only a >> stop difference. I never finished the testing but I am about to start >> using Trix and HP5 soon, this weekend. >> >> Currently I'm only using FP4 ASA 100 in HC110, 1:42 dilution which is >> close to Dilution D, (I just started mixing 12ml per 500ml for >> convenience). I generally run at 70F for 9.5 minutes light agitation, 5 >> seconds per minute. I can get a good density range for grade 2 and 3 >> paper with this combination. I made a lot of tests based on Dan Ridings >> suggested that development time and dilution might be linear. >> >> Looking over my FP4 testing today after your reply I see 2 good data >> points to test Dan's suggestion. A 1:33 dilution at 4.75 minutes and a >> 1:42 dilution for 7.5 minutes gave me the same density range for FP4 >> (1.21 >> between zone I and VIII.) Projecting a straight line down to 1:67 >> (dilution H) gives roughly a time of 12.25 minutes. So if dilution and >> development time is linear I should get the same density from FP4 >> dilution >> H (7.5 ml concentrate) at 12.25 minutes. >> >> The linear graph is interesting, (yes I just made a graph), because it >> approximates a slope of -1 which suggests that that Time + ml of >> concentrate must approximate the intercept for that density range. This >> suggests that with one good data point one could project the dilution and >> development time for any contrast range assuming the slope doesn't vary >> too much at the extremes. >> >> For Example: For FP4 I run 9.5 minutes using 12ml concentrate for a >> density range of 1.26 between Zone I and VIII. With an assumed slope of >> negative 1 the intercept is 21.5. So any combination as long as it is >> close to 21.5 should give me similar contrast range. So if I want to use >> a dilution of 7.5 ml concentrate the time would be 14 minutes. For >> Dilution B at 15ml the time would be 6.5 minutes for the same density >> range. >> >> If you eyeball the increase in contrast range between 12.25 >> minutes(range=1.14 between zones I-VIII) minutes and 14 minutes (range of >> 1.26 between Zone I and VIII) it is about one stop or one zone shift to >> the left. Just about right. This is great is it holds experimentally. >> >> Bill you may be my muse I'm glade you asked! >> >> Chris >> (212) 639-7391 >> >> -----Original Message----- >> From: lug-bounces+saganicc=mskcc.org@leica-users.org >> [mailto:lug-bounces+saganicc=mskcc.org@leica-users.org] On Behalf Of bill >> harting >> Sent: Thursday, March 24, 2005 3:59 PM >> To: Leica Users Group >> Subject: Re: [Leica] bill dilution H. >> >> Hi Chris, >> >> My approximate normal time for TriX at 800 is diultion H at 11 minutes, >> 75 >> degrees. I had an odd accident, though, in this processing. I did two >> rolls >> in one can, and a single roll of 120 from something else in another, and >> I >> accidentally unthinkingly mixed the HC110H at half strength, so Pedro, >> John >> and Bob were developed in HC110 at a dilution of one-quarter ounce syrup >> to >> 1000cc. I wondered why they were so thin. But yet apparently not too thin >> (I >> have not printed them yet). Mark was developed separately later in a two >> reel can, and I had my oh-shit moment when was pouring the syrup and >> realized what I had done on the first two rolls. So I went ahead with the >> 11 >> minute time; these negs look normal and fine. >> >> So what does this tell me? I won't know until I print, but HC110 even >> wicked >> diluted seems to keep working. I won't try that again, though. Your >> experiences? >> >> bill h >> >> >> ----- Original Message ----- >> From: "Saganich, Christopher/Medical Physics" <saganicc@mskcc.org> >> To: "Leica Users Group" <lug@leica-users.org> >> Sent: Thursday, March 24, 2005 3:44 PM >> Subject: RE: [Leica] bill H. >> >> >>> Bill, >>> What time, temp are you using for the dilution H? >>> >>> Christopher Saganich >>> >>> (212) 639-7391 >>> >>> -----Original Message----- >>> From: lug-bounces+saganicc=mskcc.org@leica-users.org >>> [mailto:lug-bounces+saganicc=mskcc.org@leica-users.org] On Behalf Of >>> Peter >>> Dzwig >>> Sent: Thursday, March 24, 2005 2:15 PM >>> To: Leica Users Group >>> Subject: Re: [Leica] Sound missing >>> >>> bill harting wrote: >>> >>>> Tuesdays a pickup jazz group plays at my local coffee shop -- a lot >>>> for >>>> talent for the price of a cup of coffee. Here are this week's players. >>>> M3 90/2.8 TriX HC110h most shot at f2.8 to f4 >>>> >>>> http://gallery.leica-users.org/album20?page=2 >>>> >>>> all opinions welcome >>>> >>>> bill h >>>> >>>> >>>> >>>> _______________________________________________ >>>> Leica Users Group. >>>> See http://leica-users.org/mailman/listinfo/lug for more information >>>> >>>> >>> Like all of them Bob. The expression on Pedro's face is great. The photo >>> of >>> Mark, although blurred conveys a lot about him, his playing and his >>> mood. >>> >>> Thanks for sharing. >>> >>> Peter Dzwig >>> >>> _______________________________________________ >>> Leica Users Group. >>> See http://leica-users.org/mailman/listinfo/lug for more information >>> >>> >>> >>> >>> ===================================================================== >>> >>> Please note that this e-mail and any files transmitted with it may >>> be >>> privileged, confidential, and protected from disclosure under >>> applicable law. 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