Thanks, Ralph. My factor is closer to 5-6. For instance, I 'normally' start seeing midtones at around 45-50 seconds and I pull it out of developer at 240 seconds. I just didn't recognize the term.. now I know. Thanks. I think a practice of adjusting your development factor while printing takes some experience and probably some testing, doesn't it? Do you use a methodical approach for adjusting your factor? For instance, does reducing your factor from 6 to 4 consistently produce an increase of 1/2 paper grade?? Can one standardize this procedure? Jim ----- Original Message ----- From: "DarkroomMagic" <info@xxxxxxxxxxxxxxxx> To: "PureSilverNew" <pure-silver@xxxxxxxxxxxxx> Sent: Monday, October 18, 2004 5:57 PM Subject: [pure-silver] Re: Polycontrast Paper Performance / Cold lite > RC papers need to be developed-out. Pulling them prematurely results in > weak > blacks and uneven development. FB papers, on the other hand, can be > developed from 2 to 6 or 8 minutes with slightly increasing contrast. > > Factorial development is not covered in my book (yet), but it is covered > briefly in AA's 'The Print'. Basically, you measure the time until you see > the mid-tones developing. Then, multiply that time by a factor of 4 - 8 (I > use '6') to get the total development time. Apply this consequently, and > you > can make up for temperature and developer exhaustion changes, always > getting > consistent contrast. It's a proven method that only works for FB papers. > > > > > > Regards > > > > Ralph W. Lambrecht > > > > > On 10/18/04 8:06 PM, "J.R. Stewart" <jrstewart@xxxxxxxxxxxx> wrote: > >> Remind me, Ralph, please: "factor of factorial development"? And why does >> it >> apply only to fiber based paper? I don't recall seeing that described >> anywhere... (not in your book is it??--if so just tell me and I'll find >> it.). >> >> In a related post I made this morning, I reported a significant >> difference >> between Ansco 120 and Anso 130M on the same paper. I wonder if the small >> differences in paper response apply to developers of the same class, e.g. >> MQ >> developers. Ansco 130 replaces HQ with glycin. It really has a longer >> scale >> in my hands. It may also be due to my use of benzo as a restrainer in my >> paper developers instead of Na bromide. Don't know. >> >> Jim >> ----- Original Message ----- >> From: "DarkroomMagic" <info@xxxxxxxxxxxxxxxx> >> To: "PureSilverNew" <pure-silver@xxxxxxxxxxxxx> >> Sent: Monday, October 18, 2004 1:36 PM >> Subject: [pure-silver] Re: Polycontrast Paper Performance / Cold lite >> >> >>> My one-time experience with Selectol Soft brought paper contrast down by >>> less than 1/2 grade. Since I get similar or better results with changing >>> the >>> factor of factorial development (FB papers only, of course), I gave up >>> on >>> soft developers and the increased darkroom complexity they bring. >>> >>> >>> >>> >>> >>> Regards >>> >>> >>> >>> Ralph W. Lambrecht >>> >>> >>> >>> >>> On 10/18/04 6:24 AM, "Ryuji Suzuki" <rs@xxxxxxxxxxxxxxx> wrote: >>> >>>> From: Charlie Thorsten <charlie_thorsten@xxxxxxxxx> >>>> Subject: [pure-silver] Re: Polycontrast Paper Performance / Cold lite >>>> Date: Sun, 17 Oct 2004 12:03:41 -0700 (PDT) >>>> >>>>> A better alternative (besides a graded paper) is to use a higher >>>>> contrast filtration (say grade 2) and develop in a low contrast >>>>> developer like Selectol Soft. This will bring it down to between >>>>> grade 0-1 but maintain better low values. >>>> >>>>> In my experience, anyway. :) >>>> >>>> Does it really work that way? In my experience it's really hard to >>>> modify contrast by anything like 1 to 2 grades. (Lith printing is a >>>> different story.) >>>> >>>> -- >>>> Ryuji Suzuki >>>> "Keep a good head and always carry a light camera." >>>> ============================================================================ >>>> == >>>> =============================== >>>> To unsubscribe from this list, go to www.freelists.org and logon to >>>> your >>>> account (the same e-mail address and password you set-up when you >>>> subscribed,) >>>> and unsubscribe from there. >>> >>> ============================================================================= >>> ================================ >>> To unsubscribe from this list, go to www.freelists.org and logon to your >>> account (the same e-mail address and password you set-up when you >>> subscribed,) and unsubscribe from there. >> >> >> ============================================================================== >> =============================== >> To unsubscribe from this list, go to www.freelists.org and logon to your >> account (the same e-mail address and password you set-up when you >> subscribed,) >> and unsubscribe from there. > > ============================================================================================================= > To unsubscribe from this list, go to www.freelists.org and logon to your > account (the same e-mail address and password you set-up when you > subscribed,) and unsubscribe from there. > ============================================================================================================= To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there.