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Why do motion picture stocks use a different process than stills stocks?


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#1 cole t parzenn

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Posted 14 June 2014 - 01:56 PM

And how/when did this start? Thanks.


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#2 Phil Rhodes

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Posted 14 June 2014 - 02:24 PM

They don't, particularly. The only difference is the removal of an anti-reflection backing on motion picture stocks. This was absent on some black and white films of old, which is why things like candle flames in old monochrome movies sometimes have a glowing ring around them.

 

Is this an essay question, or something?

 

P


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#3 cole t parzenn

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Posted 14 June 2014 - 03:03 PM

Just curious.


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#4 Heikki Repo

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Posted 14 June 2014 - 04:10 PM

No, they do use two different processes. It's not only about the remjet, there are other differences between ECN-2 and C41:

 

John Pytlak wrote:

The C-41 process uses a different color developing agent (CD4) than the ECN-2 process (CD3), so the dyes formed may be different. Other process differences will cause contrast mismatch or changes in speed.

 

As for history:

http://en.wikipedia...._Color_Negative


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