What happened to 4x5 Infrared film?

Kodak's High Speed Infrared isn't listed any more by any of the retailers, nor

is Maco. What happened? Is there no 4x5 infrared at all?

Looks like Rollei is last man standing. Kind of odd though that B&H lists 10 sheets for $75 and Freestyle lists 25 sheets for $75.

Kodak 4x5 IR was discontinued several years ago (4 or 5 if I remember) -- I bought several hundred dollars worth at the time for the freezer :-(

John, I did the same. I took a box from the freezer last year, let it thaw overnight, used it and every sheet was evenly fogged.

 

Someone tried to convince me that it is fogged from cosmic radiation.

 

Dunno.

Rollei's IR film is only a quasi-infrared, not the real thing like HIE.

I recently went by the local photo store and found it closed and gone. And wondering what happened, it occurred to me that maybe the fact that I hadn't been there in 6 months or a year was part of the reason it was gone. Ditto with this product. A couple of years ago, Kodak had their data sheets online for IR film, with a notice that sheet film IR had be discontinued due to lack of demand. Reckon they were right.

Rollei IR will only show the "real" IR effect with an 87 or 89 filter. Expect your exposure time to be at least 2 minutes. The R72 filter will work but not as good as the 87 and 89.

<i>Rollei IR will only show the "real" IR effect with an 87 or 89 filter. </i><p>

That's an interesting assertion. Since Rollie IR is not even sensitive into the region admitted by 87, 89, how do you figure it helps?

According to the Kodak book "Kodak Filters for Scientific and Technical Uses", the 87 filter has high transmission for wavelengths longer than about 780 nm. The 89B has high transmission for wavelengths longer than about 710 nm. (The book lists no 89 filter.) The datasheet for Rollei IR film, available at http://www.mahn.net/TAe.htm, shows a steeply falling response above 700 nm, ending at about 800 nm. So I would expect a reasonable speed when using a 89B filter or equivalent, but a very slow speed from an 87 filter.

I did try using a 87 w/ the rollei IR, treating it w/ the same sucessful measuerment(both exposure and film development) from Maco ir820, but nothing was recorded. W/ a 89b/R72, the rollei did exposed but not showing the IR impact that i would like to have. I miss the Maco.

 

I'm developing both film by Tmax developer. Just wonder if a different developer will help in the case of Rollei.