From: JEFFREY PAULL (email suppressed)
Date: Sat Jan 09 2010 - 13:04:09 PST
Hi, Paul
I'm interpreting you are asking about hi-contrast B&W cine film stock for blocking all the projector light?
Also, check on Kodak's website for any sound stock (for usually making the optcial soundtrack only, not the picture)
You can also use anything Kodak calls "print stock" which would usually be used to make the projection picture from the negative camera original.
There also may be a B&W film stock they call "Hi contrast". That's suitable too.
If you are, in fact, the person who needs that max black, (I've lost track, sorry)
all you need to do is unspool the amount you need, re-seal up the rest,
then simply expose it to regular room light or stronger. No amount is going to be too much.
In the camera, each bit of film gets exposed for only about 1/60th of a second,
thru the tiny hole of the f-stop. So fullly revealled film in room light, by comparison,
is getting blasted with photons - enough exposure to maximize the developing action to follow.
Again in room light (or more - back porch, for example) take a spaghetti of film - maybe 25 -100 feet,
and dunk and re-dunk it in a plastic basin of cheap B&W POSITIVE developer - Dektol brand is as good as any.
Don't, however, use a developer that says it's for developing negatives. Developers for negatives aren't as active for your purposes.
Room temp chemicals work well. 5 minutes should be plenty.
You can't expose too much or develop too much for this maximum black purpose.
I'm sure other people will post tighter particulars.
Jeffrey Paull
On Sat 09/01/10 15:00 , Paul Krimmer email suppressed sent:
> i cant find any informations about processing sound on film in the web, so
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> im asking you.
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> What type of filmstock do you use, and where can you get it?! I know you
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> can use b/w material, but developed with a special silver nitrate
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> addition, am i right?! What is the exact chemical process then to do it
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> diy ;-).... whatever, people from the l´abominable should know, shouldn´t
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> they?!
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> Paul
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> __________________________________________________________________
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> For info on FrameWorks, contact Pip Chodorov at (address suppressed)
> om>.
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__________________________________________________________________
For info on FrameWorks, contact Pip Chodorov at <email suppressed>.