Kodak RS Pan

[newcan1]

Can anyone tell me about this film? I just impulse purchased 6 x 60ft boxes of 70mm to cut down to 120 size, but I don't know much about it. It's old - exp 1964 - but it will either work or not. I think I saw something that said original ASA rating was 640 (if so, it'll probably be around 64 now). But any info you can give, I would be grateful for.

 

[bdial]

According to my '64 Kodak Master Darkroom guide, it's 650 ASA, "Moderately Coarse" grain, "Moderately Low" resolving power and Medium acutance. They show it as available in sheet and 3 1/2 inch rolls.

The D-76 1:1 developing time they give is 19 minutes @ 68 degrees, 14 minutes for D-76 straight.
That seems pretty long, but the same calculator shows 7 minutes for Tri-X in D-76 straight, so I guess it really does need a lot of development. (That's for average contrast).

 

[gone]

If it was known for moderately course grain 51 years ago, you should be in for some interesting results. You probably won't want to try developing it in Rodinal :[

 

[newcan1]

Interesting. It is probably way slower than 650 ASA now, if useable. I will do some tests. Moderately course grain on a medium format negative could look good.

 

[John Shriver]

RS was short for "Red Sensitive", it had extended red sensitivity. Makes freckles lighter in portrait work. Long roll of 70mm would be for a "school portrait camera".

It will have some base fog, that's for sure.

It would be easier to use as reloads for 116 size backing paper and spools.