HC 110 H dilution

[david_c3]

Until now, I use the Massive Development Chart times for B dilution regarding my 400 speed films (Fuji

Neopan and Kodak Tri X). I've read on this forum that HC110 using H dilution may be better.

 

What characteristics would improve if I use the higher dilution? I know the times would be longer and

would be easier to work with since they are too short with B dilution.

 

Also, there are no times in the MDC for H dilution. Does anyone have starting times for H diultion in

regards to Fuji Neopan 400 and Tri X shot at box speed?

 

Thanks in advance.

[evan_goulet]

Personally, I haven't seen too much difference in terms of image quality between the two, but I have used it to lengthen development times of Tri-X at pulled speeds. I am sure others will tell you that you can hold the highlights a bit more with the increased dilution. A good starting point is to double your times for dilution B.

[john_gleason1]

Here's a start:

 

http://www.digitaltruth.com/techdata/hc-110-h.php

 

and here (for Neopan):

 

http://www.rangefinderforum.com/forums/archive/index.php/t-8131.html

[chris_markiewicz]

hello. i have been using hc-110 dilution h almost exclusively so far. for tri-x at 400, i do 11 minutes at 68 degrees (distilled water). inversions for first 30 seconds or so, then 3 every 2 minutes (approximately - i'm not very strict with my inversions).

[david_c3]

Thanks for the responses. I was thinking that I should lessen my agitations as well. As the

insructions state invert for 10 seconds initially, then every 30 seconds for 5 seconds, this

may be too much.

 

Would it be better to agitate every minute or two like Chris' suggestion to not lose detail in

the highlights?

[chris_markiewicz]

One other note - I use the exact same time for 125px - so I develop both in the same tank. (I know that wasn't part of your question, but thought i'd add it in case you want to try a roll).

 

Also, once you try whatever times you decide on, please post your results in a new thread. I'm always looking for new info.

 

thanks

chris

[peter_schauss1]

The primary reason for using dilution H is to provide more uniform development by lengthening the development time. I also use 11 minutes at 68 degrees C for Tri-X, Plus-X, and HP5+.

[john_elder1]

I use Hc110 at dilution of 1:50 to develop HP5+(ei400)35mm format. Distilled water, 5 reel paterson tank(takes 50 ounces to fill tank)at 68 degrees. Agitation as recommended: 5 sec every 30 seconds for 7 +1/2 minutes. Net zone 1 density of .08, Net zone 5 density of .70, and net density of Zone 8 is 1.25. I believe this dilution is referred to as dilution E.

[bobmichaels]

I use a lot of HC 110 Dil. H with Neopan 400. I see no real change in Dil B and Dil H negs, just a less critical developing time. As others have said, doubling the dilution B times is a very good starting point.

 

I've settled on 9 minutes with Neopan 400 shot at e.i. 250-320. 10 minutes is probably good for e.i. 400. Not much difference between 10 and 11 minutes.

 

Any of the above will get you good printable / scannable negs that you can begin to fine tweak as you go along.

[john_gleason1]

"I also use 11 minutes at 68 degrees C for Tri-X, Plus-X, and HP5+."

 

<p>

That would be 68 degrees <i>F</i>, presumably?

[davemoss]

but what about in roto tanks? i use the unicolor tank for 4 4x5 sheets. what is the minimum amount of developer needed at that dilution?

[chris_markiewicz]

yes, 68F. 68C is approx 150F - that wouldn't be fun...