Hi. Carr’s book is a well informed source, and ive read it several times. But when the film was fresh I never found a real benefit of warming filters for Polaroid transfers. I did in-camera capture and not using an enlarger. Not sure what kid of difference that might make. With the age of the film now it would be interesting to learn if the filters have the same effect as when the film was fresh. Good luck with your transfers!
Thanks for the reply.
I purchased some Polaroid 669 film on Ebay. It it marked with the date 10/02.
It will be interesting to see what I get.... if anything. I will post again with my results.