[Tig] colour to black and white

[peter swinson]

tiruveapati wrote

>i am about to start a di of a feature which is shot  on color film  dop
wants to grade the entire film to be black and white. i still see the
>yellow cast on the print.

It is almost impossible to get a true B/W print on any colour stock, due to
the stocks cross curves. Even if you achieved it with one print run chances
are the second print run would have a cast, due to the vagaries of film
proccessing!

as far as I know the only way to guarentee B/W is to print to B/W white
stock. You would need to print test runs to get a correct grade and if the
source is a D.I. I assume you are making an interneg, which should ideally 
also be to a B/W intermedite stock.   

Of course an electronic "print", Video or Digital Cinema can easily be B/W
with correct grading and all chroma removed!

cheers

Peter