TXP Mistake ?

[Ken Neely]

I shot some TXP test sheets over weekend, having used mostly HP5+ in recent years.

The shots metered 1/125 @ F16 set for ISO 200 through an APO Sironar S 135. Sunny morning, medium tone subject, should have been about right.

Develeoped in HC110 dil H (1:63) at 68 f for 7 minutes in my Jobo -

The negatives look 2-3 stops thin, perhaps more.

Did I guess wrong on the developer time ?

Caveat - the owner of the property I was shooting yapped in my ear continuously the whole hour or so I was there. If I made an exposure mistake, I blame it on him ( grin )
but it was a consistent mistake across 4 separate shots - The meter and my calibrated eyeball are not suspect at this point..

Any thoughts ?

Ken

Pomona, Ca

[Bob McCarthy]

I would have thought dil.B would have been around 5.5 to 6 minutes,

Dil. H would have been 11-12 minutes, I would think.

But this would have been with tray style agitation,

bob

[W K Longcor]

Can you show some samples? It is easier to judge from an image.

[Ken Lee]

Another vote for wrong dilution: Too dilute. The photos should look several stops under-developed.

[Bob McCarthy]

Another thought is when developing in a Jobo and using very dilute developers, make sure the capacity of the developer is adequate for the film your processing.

HC110 Dil. H has half the capacity of Dil. B.

Overly dilute developers can cause issues when processing.

Ok, just looked up capacity Looks like 10 sheets 4x5 per liter with Dil B.

So Dilution H is 5 sheets per liter. 200 ml per sheet.

How many sheets went in the drum and how much chemistry did you use??

bob

[Ken Neely]

4 sheets of film, 300 ml of solution. I'll scan the negs and post when I get home tonight -

K

[Bob McCarthy]

By Kodak, to process 4 sheets of film you would need 800 ml of HC110 Dil. H.

Your developer just ran out of gas.

bob

[Ken Neely]

Thanks Bob - I'm going to repeat with a different but similar subject (i.e. no chatty owner !) this weekend and try again with dil b -

Ken

[Bob McCarthy]

great, let us know how it goes.

bob

[natelfo]

Another thought is when developing in a Jobo and using very dilute developers, make sure the capacity of the developer is adequate for the film your processing.

HC110 Dil. H has half the capacity of Dil. B.

Overly dilute developers can cause issues when processing.

Ok, just looked up capacity Looks like 10 sheets 4x5 per liter with Dil B.

So Dilution H is 5 sheets per liter. 200 ml per sheet.

How many sheets went in the drum and how much chemistry did you use??

bob

I don't know about 200 ml per sheet, I constantly develop 6 sheets at a time of TMX 100 in my JOBO tank using a motor base. I always use 290 ml of developer solution; 4.5 ml of HC-110 and 285 ml of water to make dilution H. My negatives have come out great and consistent every time. As far as Tri-X 320, I don't know, I have not tried it yet, but I have 2 unopened packs of TXP that am dying to shoot with and would love to hear more input on this film with HC-110, especially using the JOBO rotary tank.