[pure-silver] safes lights - was New color head "discoveries"
- From: "Rob Champagne" <app@xxxxxxxxxxxxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Thu, 13 Jan 2005 13:47:33 +0000
for what its worth I use a "Kaiser Duka 50" safe light which is a sodium light
and I get upwards of 20 minutes safety with all papers I use including Forte
ploywarmtone. I use it with the red filter (it comes with a white filter as
well which can be used for colour work). Admittedly I don't have it turned up
to full brightness and point it at the white ceiling so that the light is
reflected around the darkroom.
These safelights never seem to get a mention but they are very very good even
though a little expensive.
forte polywarmtone is known for being susceptible to fast fogging from
safelights and that may be the cause of not being able to get above a grade 3.
rob c
At 12/01/2005 22:10 -0600, you wrote:
>FWIW, I have found that Forte will not go above "contrast 3" no matter what
>you do (well, whatever I do, anyway!). You can use VC filters -- use as
>much M as you want; use the Ilford or Kodak or Oriental discrete filters for
>#5. It doesn't matter. You get contrast 3. Things ramp up pretty pretty
>predictably to #3, but all of a sudden additional M doesn't seem to do very
>much!
>
>This behavior is consistent with some notes I exchanged with some other
>people on this subject. I do not understand the behavior, but the paper is
>consistent in this respect.
>
>That said, I have found the 11x14 and 16x20 varieties to behave somewhat
>differently from one another. I assume that has to do with emulsion
>batches.
>
>I have been able to get much greater contrast using lith developers. Forte
>clearly doesn't "lith" the way Tim Rudman would describe it, but the results
>are pleasing, for the right composition, just the same.
>
>I have not been in love with the results I got from trials of Forte with
>Ansco 130. I have been much happier using regular MQ-type developers, e.g.
>Ansco 125, or with Formulary BW65 1::1::6.
>
>And, btw, forget the Thomas safelight. It's just not safe with VC paper. I
>use four oldie-but-goodie el-cheapo lights fitted with 7.5 watt bulbs and
>Kodak 0C filters, mounted high up on the walls. This works well.
>
>Don Feinberg
>ducque@xxxxxxxxxxxxxx
>
>> Well, my Omega Chromega Dichro DII came in last weekend and I've begun
>> testing. with VC papers. First VC I've printed in 20 years.
>>
>> I've been using metol glycine based Ansco130 paper developer (modified by
>AA
>> and without hydroquinone).That's where I started. Problem is, the hardest
>> contrast I was able to get with 0Y/170M was about 0.8 on Forte Polygrade V
>> (boy is that paper really blue!!) and about 0.6 on Kodak Polymax Fine Art.
>> The softest contrast comes in about right at 1.8 (polymax) and 1.4
>> (polygrade).
>>
>> Glycine is a much softer developer.. is that why I'm able to get no more
>> than ISO ~3.5 on the VC papers... do the emulsions require stronger
>> developers for satisfactory development? I tested my graded papers under
>> white light exposure, developed them in A130, and acquired the right
>scale.
>> I developed all the test prints at 6x factorial so I would think that
>would
>> be sufficient, and I was able to get max black.
>>
>> I ran an Ansco 120 test last night. The test prints look better, but
>haven't
>> read them yet.
>>
>> Also, I learned that both of these paper are very sensitive to the Thomas
>> safelite... I ran a screening test and at 5 minutes exposure I got fog
>that
>> appeared as Zone VI reflectance.. So, I move the safelight, unplug it, or
>> change papers to one less sensitive, and retest. Such is life.
>>
>> J.R. Stewart
>> Leesburg, VA
>>
>>
>>
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