Tri-X @ 400 in Dilution B - How Long?

Ariston · Sep 7, 2019

Kodak says to develop for 3:45 at 68 F. Can someone confirm this? Looking at old notes, I (for some reason) developed a roll for 7:30 that ended up too dense; but I would think they would be completely unusable at almost double the time, and they weren't. This makes me nervous that 3:45 will be too short of a time, and I don't want to lose these negatives.

I am relatively new to Tri-X, so all input is welcome.

Alan9940 · Sep 7, 2019

Assuming you're developing in a tank @ 68F with 30 secs initial agitation followed by 5 secs agitation every 30 secs thereafter, 5 1/2 mins should be darn close. This is based on the old HC-110 version; there is a new version out which I have no experience with. For all the HC-110 info you'll ever need, see:. covingtoninnovations.com/hc-110.

NB23 · Sep 8, 2019

It is of general knowledge that Kodak messed their published Times for Tri-X.

MattKing · Sep 8, 2019

The 3:45 time for Tri-X no doubt yields negatives that meet some sort of objective, ISO related criteria.
A really large number of people prefer a lot more contrast though from Tri-X, so a lot of people consider that time to be an error.
I expect that it yields good machine prints.

NB23 · Sep 8, 2019

Alan9940 said:
Assuming you're developing in a tank @ 68F with 30 secs initial agitation followed by 5 secs agitation every 30 secs thereafter, 5 1/2 mins should be darn close. This is based on the old HC-110 version; there is a new version out which I have no experience with. For all the HC-110 info you'll ever need, see:. covingtoninnovations.com/hc-110.

Yeah, and Covington talks about Old Tri-X, not the “new TRI-X”.
This is the Kodak bullshit in action where they change their products while telling us that it’s still the same good’old stuff.

Ariston · Sep 8, 2019

Alan9940 said:
Assuming you're developing in a tank @ 68F with 30 secs initial agitation followed by 5 secs agitation every 30 secs thereafter, 5 1/2 mins should be darn close. This is based on the old HC-110 version; there is a new version out which I have no experience with. For all the HC-110 info you'll ever need, see:. covingtoninnovations.com/hc-110.

Thanks Alan, I will try 5 1/2 minutes. That link you gave did not work on my computer - I use nothing but HC110 at the moment, so I would like to see it. Thanks again!

Ariston · Sep 8, 2019

NB23 said:
Yeah, and Covington talks about Old Tri-X, not the “new TRI-X”.
This is the Kodak bullshit in action where they change their products while telling us that it’s still the same good’old stuff.

NB23 - Where is that Zine of yours?!

Alan9940 · Sep 8, 2019

Ariston said:
Thanks Alan, I will try 5 1/2 minutes. That link you gave did not work on my computer - I use nothing but HC110 at the moment, so I would like to see it. Thanks again!

Sorry about the link. Just do a Google search of "covington innovations hc-110" and it should come up in the search results as the first entry.

MattKing · Sep 8, 2019

Try: http://www.covingtoninnovations.com/hc110/

Rolfe Tessem · Sep 9, 2019

Through densitometer testing, I arrived at 6:00 minutes @ 68 deg F, ISO 200. But that was with an automatic Jobo and an automatic 5 minute pre-wet.

ann · Sep 9, 2019

As was mentioned Kodak made a mistake years ago when they made a change+in manual plants

At the time the internet went crazy and folks tended to use their old times when things+died down

At one time the time listed at 68 was 7 minutes. In our lab and with testing for my results we use 6 minutes we have continued to use that time

Tri-X @ 400 in Dilution B - How Long?

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