RE: physical developers

Hi Martin,
In it formulates it of the developing GP-3, I don't see the quantity of
necessary water. Is 1000 ml., 1 gallon?.

Thank you and pardon for my English, text translated by computer.

-----Mensaje original-----
De: MARTINM [mailto:martinm@SoftHome.net]
Enviado el: martes, 24 de agosto de 2004 12:05
Para: alt-photo-process-l@sask.usask.ca
Asunto: Re: physical developers

Ray, if you are looking into processing "Lipps", you might consider those:

GP-3
stock solution:
phenidone.................0.2g
hydroquinone...............5g
sodium sulfite...........100g
potassium hydroxide..25g
amonium thiocyanate..45g

15ml stock solution + 400ml distilled water: 5 - 15min. at 20°C

Valenta
A
pyrogallol.................1g
water......................100ml

B
ammonia (s.w. 0.91)..67ml
potassium bromide......20g
water......................200ml

10ml A + 20ml B + 70ml water

Generally speaking of that kind of developers (= "colloidal developers")
developing times might greatly depend on the initial emulsion hardness as
well as silver concentration and grain size...

Martin

----- Original Message -----
From: "Bill William" <iodideshi@yahoo.co.jp>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Tuesday, August 24, 2004 6:29 AM
Subject: physical developers

> Speaking of physical developers, anyone here use them?
>
> Got any formulas / experience you would like to share?
>
> Ray
>
> __________________________________________________
> GANBARE! NIPPON!
> Yahoo! JAPAN JOC OFFICIAL INTERNET PORTAL SITE
> http://mail.ganbare-nippon.yahoo.co.jp/
>
Received on Wed Aug 25 12:02:28 2004