Konica 750 infrared - development in HC110?

[Ian David]

I have just dug a few old rolls of Konica 750 (mild infrared) film out of the back of the fridge. It has been sitting there for a few years, and I think it is time to put it through the camera. I am proposing to shoot it at around EI 32 (before applying a filter). Does anyone have any recommended development times for this stuff in HC110? Many thanks for your thoughts.

 

[Keith Tapscott.]

I have the technical data sheet for that film, but there`s no information for HC-110. The times are given for Konicadol DP (D-76 type) =6 minutes,
Konicadol Fine (Kodak DK-20) =7 minutes and Konicadol Super (Ilford ID-68) =6 minutes all at 20*C. Sorry, but I can`t find any info about Konica 750 infra-red for HC-110 processing.
You might be better off buying a 1 litre pack of D-76/ID-11.

 

[Keith Tapscott.]

I have just dug a few old rolls of Konica 750 (mild infrared) film out of the back of the fridge. It has been sitting there for a few years, and I think it is time to put it through the camera. I am proposing to shoot it at around EI 32 (before applying a filter).

The technical data sheet suggest an exposure on a sunny day of 1/60th at f/5.6 with a Kenko R1 filter on the lens or an E.I. of 32 without a filter.

 

[glbeas]

I've noticed Konica 750s characteristic curve is very similar to Tech Pan film and that it can be developed in Technidol for the same time as Tech Pan with a slight increase in speed. You might try the figures for Tech Pan in HC110 as a starting point.

 

[Ian David]

Thanks very much for the replies Keith and Gary. I have now been directed to the Massive Dev Chart, which I looked at before I posted, but which I see has some recommendations for Konica 750 in the "unlisted" area. Looks like 7 mins at 20deg will be my starting point in HC110. Will see how I go...

Ian