Agfa Scala as negative

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piterengel - 13 Feb 2004 06:59 GMT

Hi, I've seen on digitaltruth that it is possible to treat Scala with
Fino or Rodinal to obtain a negative. What about other common
developer: HC110, ID11, etc? My interest is independent form the very
high cost of this film, it is obvious that negatives are done with
common films, but I've one roll of Scala (that I do not appreciate
very much as slide) and I would like to try.

Regards,

piterengel

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F?dor Pavlovic' - 13 Feb 2004 08:28 GMT

> Hi, I've seen on digitaltruth that it is possible to treat Scala with
> Fino or Rodinal to obtain a negative. What about other common
> developer: HC110, ID11, etc? My interest is independent form the very
> high cost of this film, it is obvious that negatives are done with
> common films, but I've one roll of Scala (that I do not appreciate
> very much as slide) and I would like to try.

this photos: http://www.marcofavali.com/angiolino.htm is agfa scala
developed as negative in Ornano fino ST33 1+1

Times the same of digitaltruth.

bye

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Richard Knoppow - 13 Feb 2004 21:20 GMT

> Hi, I've seen on digitaltruth that it is possible to treat Scala with
> Fino or Rodinal to obtain a negative. What about other common
[quoted text clipped - 6 lines]
>
> piterengel

Any reversal film can be developed as a negative. In fact,
it _is_ developed as a negative as the first step in
processing it. I don't know of any advantage to Scala as a
negative. It _is_ possible to reversal process it at home,
there are instructions on a couple of web sites. At one time
black and white reversal films were very common for home
movies so there wasn't much mystery about them. It is
essentially the same process used to produce color
transparencies but without the color developer.

Signature

---
Richard Knoppow
Los Angeles, CA, USA
dickburk@ix.netcom.com

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piterengel - 14 Feb 2004 07:56 GMT

> > Hi, I've seen on digitaltruth that it is possible to treat
> Scala with
[quoted text clipped - 21 lines]
> essentially the same process used to produce color
> transparencies but without the color developer.

In fact I've already tried the positive process at home, using Tmax
and Delta both 100 ISO and a homemade process that is the result of a
combination of vary ideas form the net. Best results I've obtained
using potassium bichromate as bleach agent and few tricks during
process.
To tell the truth I've no particular reasons on obtaining negatives
form Scala, a part my personal curiosity in doing this, expecially
using the most common developer. And considering, as already told,
that I don't like Scala as slide: in my opinion it seems a "more
gray/less gray" film rather than a black/white one.

piterengel

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Richard Knoppow - 15 Feb 2004 02:47 GMT

> "Richard Knoppow" <dickburk@ix.netcom.com> wrote in message

news:<UcbXb.2759$tL3.1459@newsread1.news.pas.earthlink.net>...

> > > Hi, I've seen on digitaltruth that it is possible to treat
> > Scala with
[quoted text clipped - 34 lines]
>
> piterengel

Have you tried having Scala processed by Agfa? I would
try one roll that way as a comparison. Then you will know
what the film is capable of.
Reversal processing is simple in concept but not so
simple in excecution especially getting the first developer
optimised for the film. Its activity and the amount and type
of halide solvent in it are vital. Without the solvent the
highlights will be grayed down. The contrast of the first
development is critical to getting full scale on the slide.
The amount of fogging re-exposure is also important although
there is more room for error there than in the first
developer. Most modern reversal processes use a fogging
agent in the second developer but good results can be gotten
with fogging with light. It must be sufficient to make
nearly all of the remaining halide developable in the second
developer.

Signature

---
Richard Knoppow
Los Angeles, CA, USA
dickburk@ix.netcom.com

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