[pure-silver] Re: New color head "discoveries"
- From: "Koch, Gerald" <gkoch02@xxxxxxxxxx>
- To: "'pure-silver@xxxxxxxxxxxxx'" <pure-silver@xxxxxxxxxxxxx>
- Date: Thu, 13 Jan 2005 15:06:12 -0500
I have never had any problem getting sufficient contrast.
I do not use graded paper and have no way to compare.
I use a color head since it gives me the advantage of using a single filter. I
am usually not interested in maintaining a constant exposure time. I like a bit
of snap in my prints but if I should ever want a true grade 2 then I would add a
bit of yellow rather than using no filtration. Kodak says that for my enlarger
and their Polymax paper 10Y = G2 and 20M = G2-1/2.
-----Original Message-----
From: pure-silver-bounce@xxxxxxxxxxxxx [mailto:pure-silver-bounce@xxxxxxxxxxxxx]
On Behalf Of Rob Champagne
Sent: Thursday, January 13, 2005 2:22 PM
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: New color head "discoveries"
Doing it this way do you find it difficult to get high contrast on VC paper when
needed and
what happens when you dial in your paper manufacturers recommended setting for
grade 2, i.e. does contrast up, down or stay about the same?
I suspect that Ilford work closely with Durst in the testing of their papers
which may explain my observations being somewaht different from yours if you are
not using a Durst dichroic head.
At 13/01/2005 13:56 -0500, you wrote:
>I adjust my film development times to yield negatives that print with
>normal contrast on VC paper *without* any filtration. Depending on the
>brand of paper this is comparable to a grade 2 to 2-1/2 graded paper.
>This usually requires developing for longer than the manufacturer's
>published times (which seem to be for condenser enlargers). Agfa is the
>only manufacturer that I know of that publishes film development times
>for different gammas (CI or whatever). I use filtration only for those
>negatives which need some tweeking.
>
>Jerry
>
>-----Original Message-----
>From: pure-silver-bounce@xxxxxxxxxxxxx
>[mailto:pure-silver-bounce@xxxxxxxxxxxxx]
>On Behalf Of Rob Champagne
>Sent: Thursday, January 13, 2005 12:56 PM
>To: pure-silver@xxxxxxxxxxxxx
>Subject: [pure-silver] Re: New color head "discoveries"
>
>
>big snip
>
>> The filters of a color head will not give you the full range of
>>contrast available from VC paper with the use of dedicated filters.
>>They should give you a couple contrast grades on either side of
>>"normal" but filters should be used to obtain the maximum and minimum
>>contrast values.
>
>big snip
>
>>---
>>Richard Knoppow
>
>I wonder whether my observation is true for other dichroic filter head
>enlargers. The Ilford Y+M figures for grade 2 on my Durst CLS501 head
>enlarger give approx an ISO grade 1 result on paper. It occurs to me
>that because dichroic filtration does not seem to give as much contrast
>as filter sets, and because most new enlargers have dichroic heads,
>that Ilford, and maybe other manufacturers, use this to its advantage in terms
of film speed.
>To get a true ISO grade 2 using ilfords G2 Y+M figures for my enlarger I have
to
>give the negative more development which in turn gives allows a faster film
>speed. So what I'm speculating here is that modern film speeds may be tailored
>by the manufacturers to suit printing on dichroic heads with Y+M filtration. It
>should be noted that by using increased development of the negative the overall
>contrast obtainable from a dichroic is not far short of a true G5 and if you
>take neg development far enough then a true G5 is obtainable from a dichroic
>head.
>
>It all depends on what you are tailoring your development to. Do it to
>0 filtration and your negs will be too soft for G5 on dichroic
>settings. Do it to G2 Y+M settings of your dichroic head and you will
>get faster film speed and availability of higher contrast in your
>print.
>
>=======================================================================
>=========
>=============================
>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.
Other related posts:
