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exposure compensation for bleach by-pass technique


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#1 Shubham Kasera

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Posted 02 February 2009 - 11:37 PM

hello guys
im about to shoot my diploma film and would want to process the negative with 50% bleach bypass technique. I'm trying to get a look of seven. would anyone know as to how to process the negative to achieve such a look. moreover, what is the exposure compensation required for various percentages of bleach bypass, both in the negative and printing stages.
thank you
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#2 Adrian Sierkowski

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Posted 02 February 2009 - 11:43 PM

TEST TEST TEST!
It'll be highly dependent on your lab, and your costumes/art direction and your lighting/filmstock/printstock etc. . .
you can approximate it in post in a telecine suite which i also recommend testing....
Though if memory serves, Se7en used a technique called CEI (I think, something like that... I'd have to check one of the books I have at home mentioned it specifically). But seriously, you need to test that out before hand as it's very variable dependent.
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#3 Shubham Kasera

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Posted 02 February 2009 - 11:47 PM

thnx
as for my stock is concerned im using KODAK 5217
well, no money for test
it would be great if u could let me know about the technique used in seven
thnx
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#4 Adrian Sierkowski

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Posted 02 February 2009 - 11:50 PM

Deluxe CCE (not CEI) (http://www.bydeluxe....se_printing.php) see under special processing
and if you can't test it, I STRONGLY recommend not doing it. As it's photochemical, you can really get yourself screwed fast... Look into a color-correction option as there is an "undo" button.
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#5 Shubham Kasera

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Posted 02 February 2009 - 11:58 PM

thnx
will do
n keep u posted!
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#6 Saul Rodgar

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Posted 03 February 2009 - 03:16 AM

I used the same stock (Kodak '12 200T) for full Bleach Bypass last year. I liked it. I rated it 400 ASA. It is grainy but not too bad. If you use Kodak '12 100T, and rate it 200 ASA, you will get probably the finest grain you can with BB. Also, it can be done digitally later in post.

http://www.cinematog...eachBy-pass.htm
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#7 Shubham Kasera

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Posted 03 February 2009 - 03:24 AM

I used the same stock (Kodak '12 200T) for full Bleach Bypass last year. I liked it. I rated it 400 ASA. It is grainy but not too bad. If you use Kodak '12 100T, and rate it 200 ASA, you will get probably the finest grain you can with BB. Also, it can be done digitally later in post.

http://www.cinematog...eachBy-pass.htm



hello
did u try the bleach bypass on the negative stage?
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#8 Chris Keth

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Posted 03 February 2009 - 03:32 AM

Bleach bypass isn't a supported method of processing therefore no standards exist for it. What one lab calls a full bypass another may call 70% or what have you. Adrian is right that tests are needed. If you can't test, I wouldn't do the effect. It's easy to get an image on film, it's incredibly robust, but the chances of getting an acceptable image are decreased a lot if you totally ballpark a bleach bypass formula with an unknown lab process and guessed exposure.
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