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Old March 3rd 04, 06:06 PM
Nicholas O. Lindan
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Default Ilford 11x14 film specs

"Thomas Rauers" wrote
Hallo CBlood59, Du schriebst am 03.03.2004 wrote:


Seem to be two questions/answers he

http://www.ilford.com/html/us_english/pdf/FP4Plus.pdf

It doesn't tell anything about sheet film sizes. It only says that
the film "is available in a wide range of standard sizes".


Availability of 11x14 in a specific emulsion is best gotten from
the vendor: B&H sells HP5+ in 25 sheet 11x14 packs, for instance.

A large enough vendor can have the film made for resale in any
desired size. A minimum quantity would apply and the price would
be higher. But it is possible that only B&H carries FP4 in 3 1/4 x
4 1/4, and that's because it is the size they ordered it in.

I need to know the dimensions of Ilford 11x14 sheet film. I've
tried to download the info from the Ilford website, but my
software can't read the pdf file. Could someone forward the
info to me?


This sort of splintered information drives folks (including me,
who [theoretically] know why and how this is done) nuts.

You have to think like an Engineer: the above specification sheet is
not for the film as a roll/sheet but for the emulsion coated plastic
that is used to make a roll or sheet of film.

You will usually find there is document for each separable step
in the manufacturing process.

The emulsion feedstock is what is described in the spec above.
It says nothing about the size the feedstock is cut into, where
the gelatin comes from ... Only those things that are uniquely
'FP4ish' are specified.

Now a box of sheet film made from this emulsion would have a
separate document specifying format/sheets per box/packaging for
the pack and ship operation. This would tell you that they
do make the stuff in 11x14.

A separate document would specify the actual dimensions
and tolerances for 11x14 format film. This is done because
raw 11x14 flows from a silting/cutting/notching operation
into a packaging operation that places the film into
consumer cartons, bulk cartons for Adorama, 25 sheet/50
sheet, 100.... A change in the color of the carton, or the
discontinuance of 50 sheet packs has nothing to do with the
properties of the emulsion or the size of 11x14.

The actual physical size of llx14 film would be found
in an ISO, ASA, NBS, SPIE ... specification, as all film
manufacturers make 11x14 film in the same actual size (which
is most likely _not_ exactly 11x14 inches).

Think 'need to know'.

--
Nicholas O. Lindan, Cleveland, Ohio
Consulting Engineer: Electronics; Informatics; Photonics.