Stand development with Tmax Dev and HP5+

[Whateverist]

Hi all,

I've got a roll of exposed HP5+ 120 film that I'd like to experiment on with stand development, since I have a bit of Tmax dev leftover. Has anyone given this a try before? I was guesstimating 1:19 with 90 minutes and agitation every 30 minutes based on previous experiments.

 

[Chriscrawfordphoto]

Tmax is not the sort of developer usually used for stand since it is not made for high dilutions. Developers like Rodinal and HC-110 are what most use. I think 90 minutes will be too long.

Kodak publishes times for Tmax Developer diluted 1+7 and 1+9 for Tmax 100 and Tmax 400 films. I've found with most films that multiplying the standard 1+4 time by 1.5 will get you the correct time for the 1+7 dilution, and multiplying the 1+4 time by 2.25 will get you the time for the 1+9 dilution on most films.

Ilford recommends a time of 6.5 minutes at 68 degrees for HP5 developed in Tmax Developer in the standard 1+4 dilution. I have not tested it in the 1+9 dilution, but I would recommend trying 14.5 minutes at 1+9. Extrapolating from that, I'd say that for a 1+19 dilution, that the right time would be about 40 minutes.

Tmax is a pretty strong developer. I think even with the reduced agitation used for stand developing that a 90 minute developing time will be way too much.

 

[Whateverist]

Thanks for the info!