[pure-silver] Re: developing Royal Pan sheet film.
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Fri, 1 Apr 2011 13:22:31 -0700
----- Original Message -----
From: "Bogdan" <bkarasek@xxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Thursday, March 31, 2011 4:52 PM
Subject: [pure-silver] developing Royal Pan sheet film.
Hello all,
I was doing an inventory of my darkroom freezer and found
an unopened
box of 100 4x5 sheets of 4141 Royal Pan film. Also a box
of 3¼x4¼ Royal
Pan; have holders and Graphic cameras for this size.
Why waste good film , I say...
Any ideas as to development times and possible ASA? A
Google search
gives 400 asa and 1250 asa for this film.
I was thinking that maybe I should develop in Diafine.
Any and all suggestions are welcome.
Cheers,
Bogdan
There were two films made simultaneously, Royal Pan, and
Royal-X Pan. If this is Royal Pan its characteristics are as
follows:
Speed: ASA 200 Daylight, 160 Tungsten
Processing information is given for DK-50, DK-50 1:1 and
DK-60a.
For Normal contrast: DK-50 2-3/4 minutes continuous
agitation in a tray or 4 minutes intermittant agitation in a
tank. Gamma is around 0.6 for this development.
Lower Contrast: DK-50 1:1 Tray, 5 minutes; Tank, 8 minutes
All at 68F.
The sensitometric curves show a fairly long toe for normal
development. The spectral response to daylight is quite
uniform so the film's tonal rendition of color in daylight
should be good without a filter.
Grain, Resolving Power, Sharpness (Acutance) are all
rated as "Medium" and Degree of Enlargement as "Moderate".
The notch code is two V notches with a medium space
between them.
This film appears to have been available only as sheet
film.
D-76 might be satisfactory but would probably be best
used full strength. A more active developer like T-Max RS
would probably be closer to DK-50.
I have only preliminary information on Royal-X Pan in
the material I have available here. Its noted in the 7th
edition of the Kodak Film Handbook (1957) as a new film but
part of the insert appears to be missing. By memory it was
rated at ASA 1250 but would take considerable pushing. It
also had a problem with dichroic fog in some developers
(maybe D-76), I think DK-50 was the recommended developer. I
think this film was not entirely satisfactory and was
discontinued after a relatively short time. It has not
relation to Royal Pan other than the similarity in names,
something Kodak indulged in on occasion.
--
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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