[pure-silver] Re: developing Royal Pan sheet film.
- From: Helge Nareid <hn.groups@xxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Fri, 01 Apr 2011 22:10:04 +0100
On 01/04/2011 21:27, Richard Knoppow wrote:
>
> ----- 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
>>
> A further note (I always forget something). The 1957 Kodak
> handbook was published before the ASA changed their measuring method
> from the original Kodak method with a one stop fudge factor to the
> simpler modified DIN method, which did not have the fudge factor. The
> difference in speed is one stop so by modern ISO methods Royal Pan
> film would have an index of 400.
> I am not sure what applies to Royal-X Pan. The film was so odd
> that Kodak may not have used the old ASA method for recommended
> speeds. If they did it would be ISO-2500. It was foggy when new and I
> think had very short shelf life.
I've had some good experiences with Royal-X Pan both in 120 and 4x5"
formats in the 80's. One of the really good things about it as I recall
was its reciprocity behaviour. It was really good for night photography,
which was also well suited for its long-toe curve. The grain was
noticeable, but I quite liked the tonal range.
My base speed was 800, corrected as required for reciprocity. I used
HC-110 dilution B for processing, but I don't have any further details
handy (from memory 9 minutes at 20C for no reciprocity correction).
- The Horrible Helge
PS: Royal-X pan was also pretty good at airport security controls, the
guidelines at the time said film speeds up to ISO 800 was all right for
X-ray inspection. Having a couple of rolls of Royal-X pan with a nominal
speed of ISO 1250 in my bag got me a hand inspection without any further
ado ...
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