On Mar 23, 7:51 pm, "Richard Knoppow" <dickb...@[EMAIL PROTECTED]
> wrote:
> "piterengel" <pslavi...@[EMAIL PROTECTED]
> wrote in message
>
>
news:7a8f0325-f343-4429-9f65-1bd35ad5dbdb@[EMAIL PROTECTED]
>
>
>
> >I start a new post about this film.
>
> > I've tried my first roll, exposed at 25 ISO, taking
> > pictures of
> > mountain landscape, with few snow and clouds on sky.
>
> > I've tried Delagi #8 developer, 15 mins at 20 degrees,
> > exactly the
> > same used with Kodak TP film. The result is a quite weak
> > negative,
> > completely different from TP one. So I can conclude, by
> > now, that
> > Rollei ATP does not seem to be the subsitute of TP. I
> > would like to
> > try with POTA developer, but after Delagi this seems a
> > lost of time.
>
> > Looking for technical sheets of Rollei ATP I see another
> > developer,
> > Docufine LC. From MSDS I find:
>
> > hydroquinone 3 %
> > sodium hydroxide 1 %
> > sodium carbonate 8 %
>
> > for a total amount of solids of 12 %
>
> > But at point no. 9 of MSDS it is written that the solids
> > content is 23
> > %, very different from 12 % found before. So, where is the
> > trick? Are
> > there non dangerous components that increase the solids
> > amount but
> > essential for developer?
>
> MSDS are legal not technical documents. They often
> obscure the contents of whatever they are written for as
> much as expose them. Many ingredients do not have to be
> listed if they are present in very small amounts. For
> instance, Kodak HC-110 contains a Phenidone derivative but
> its not included in the MSDS.
> I don't remember what is in Delagi No.8 but I am very
> skeptical that the Rollei film is much like Tech Pan other
> than being a very slow fine grain film. Technical Pan was
> not a microfilm although it could be used for document
> copying. Some high contrast microfilms can be used as extra
> fine grain pictorial films with special developers but there
> was something special about Tech Pan which plain microfilm
> does not seem to posses.
>
> --
> ---
> Richard Knoppow
> Los Angeles, CA, USA
> dickb...@[EMAIL PROTECTED]
#8 is a modified POTA (from Anchell's book):
Sodium sulphite 25 g
Phenidone 1.4 g
Borax 2 g
benzotriazole 0.2 % 15 ml
for 1 liter
I completely agree with Mr. Knoppow: Rollei ATP is NOT the same of TP.
And I was not able by now to find another film like that.
Anyway, about MSDS, the principal matter, in my opinion, is that the
two sources (the english version and the german one) give two
completely different kind of developer, the first based on HQ and the
second on phenidone. I think the truth is the addition of the two, a
PQ developer. Surely I'll try this solution, as I'll be back to work
where I've all chemicals. But first I'll try a very diluited rodinal
solution, 1+300 for example, with a semi-static procedure. I'll let
know results.
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