## [pure-silver] Re: Gigabitfilm

• From: "Koch, Gerald" <gkoch02@xxxxxxxxxx>
• To: <pure-silver@xxxxxxxxxxxxx>
• Date: Fri, 25 Feb 2005 10:56:34 -0500

```Probably not low contrast enough.  Low contrast developers like the =
Gigabit developer cannot produce a usable image with normal film.  I =
assume the Clayton developer can.

If you wish to experiment, here's a formula that purports to be the H&W =
developer.

Solution 1

Distilled water (50=B0C) ................. 300   ml
Sodium sulfite (anhy) ..................   8.0 g=20
Hydroquinone ...........................   1.2 g=20
Sodium carbonate (anhy) ................  30.0 g=20
Phenidone ..............................   8.3 g=20

Solution 2

Distilled water (50=B0C) ................. 600   ml
Sodium sulfite (anhy) ..................  60.0 g=20
Distilled water to make ................   1.0 l=20

Method of Preparation

Make up the two solutions.  Add Solution 2 to Solution 1 and dilute to 1 =
liter.
Store the concentrate in several small, well sealed bottles.  The =
concentrate should=20

Usage

Dilute 1+15 with distilled water.  Average development time is 11 - 15 =
minutes
at 20=B0C.  Agitate continuously for the first minute and then for 5 =
seconds
every 3 minutes.

-----Original Message-----
From: pure-silver-bounce@xxxxxxxxxxxxx =
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of titrisol
Sent: Friday, February 25, 2005 10:45 AM
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: Gigabitfilm

Would the Clayton Low Contrast developer work for this?
I believe this film could be great for Minox and sub-mini camera users

--- "Koch, Gerald" <gkoch02@xxxxxxxxxx> wrote:

> Gigabit film is a microfilm (most likely made by Agfa).  Their=20
> developer is an extremely low contrast developer essential to tame the
> high
> contrast of the microfilm.  There's nothing new about such a
> combination.  In the 70's there was a company that sold such a
> combination under the name H&W Control.
>=20
> While such combinations can yield virtually grainless prints with
> extreme detail there are some problems. =3D20
>=20
> 1) The contrast of the negatives, while lower than normal for=20
> microfilm, is still higher than what is considered normal for=20
> continuous tone
> negatives.  This makes them difficult to print and is the most
> serious
> drawback.
>=20
> 2) The film has little or no exposure latitude requiring exposures be
> bracketed. =3D20
>=20
> 3) Lens faults are emphasized because of the lack of grain in the
> negatives.  In fact, unless you have a really high quality
> lens, your
> prints will appear less sharp than if you had used a
> conventional film
> such as Efke 25.
>=20
> 4) The film and required developer are expensive.  35mm microfilm is=20
> not perforated so the user is locked out of any alternative source
> of film.
> Gigafilm has the film perforated especially for their sales.
>=20
> I have not tried this latest incarnation and have no inclination to do
> so after previous disappointments.  Perhaps Gigabit has
> overcome the
> inherent problems.  H&W went out a business after the initial
> flurry of
> interest waned because of basic dissatisfaction.
>=20
> Jerry
>=20
>=20
> -----Original Message-----
> From: pure-silver-bounce@xxxxxxxxxxxxx=20
> [mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Emmanuel
> Schnetzler
> Sent: Friday, February 25, 2005 8:52 AM
> To: PureSilver list
> Subject: [pure-silver] Gigabitfilm
>=20
>=20
> Hi all,
>=20
> I was reading the Zeiss newsletter yesterday and they are talking=20
>  Gigabitfilm:
>
> 125=3D3D
> 6F2C002B7DBA
> website...)
>=20
> Looks like it's been out for a while now (no 120 though,=20
> unfortunatelly). A=3D3D pparently it was reviewed in the British B&W
> magazine, which I receive, but=3D3D  I missed it. I'll have to
> look for it
> when I'm back home.
>=20
> Does anyone know anything about it? JandC are selling it in 35mm.
>=20
> Thanks!
>=20
> Manu
> --=3D3D20 ___________________________________________________________
> Sign-up for Ads Free at Mail.com
>=20
>
=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D=
3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D
>
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>
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3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D
>
=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D=
3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D
> =3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D
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