On 2007-10-21, Richard Knoppow <dickburk@[EMAIL PROTECTED]
> wrote:
>
> "piterengel" <pslaviero@[EMAIL PROTECTED]
> wrote in message
> news:1192991717.030130.83460@[EMAIL PROTECTED]
>> Hi, becaise it no more possible to find lith film I need
>> to try with a
>> qute common film to obtain very high contrasted pictures.
>> I have Efke
>> KB 25 and Rollei PAN 25 at home. Can anybody suggest a
>> developer to
>> have extremely contrasted subjects?
>> Thanks all
>> P.
>
>
> The highest contrast is gotten using a lithographic
> developer like Kodak D-85 which produces "infective"
> development. However, D-85, and similar developers, use
> Formaldehyde, which is nasty stuff.
I use Kodak litho film (not much) and one of their litho developers.
It does not contain liquid formaldehyde, but paraformaldehyte that
is a related compound. J.T.Baker have this to say about it:
http://www.jtbaker.com/msds/englishhtml/p0154.htm
As far as I can tell, I have never had any trouble with the mixed
working strength developer.
> There are somewhat lower
> contrast developers, like Kodak D-8, using Hydroxide, which
> produce very high contrast but not quite what a true
> lithographic developer gives. I don't think a lith developer
> is needed unless you are doing true line work.
> Lith film is still made but I don't know where to get it
> outside of the US.
> For pictorial purposes a print developer like Dektol
> will give you quite a bit higher contrast on film than the
> usual film developers but at the cost of being quite grainy.
> Since print developers are cheap and easy to obtain I would
> try one first to see if the contrast is high enough.
>
>
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