Members: 76,248   Posts: 1,680,346   Online: 973

# Thread: hc 110 dilution

1. ## hc 110 dilution

Forgive me if this is a basic question. I just got a new developing tank and on the bottom it indicates that I should use 650ml of liquid if I am developing two reels of 35mm film. I have reverse engineered the HC 110 data to determine that approximately 6ml of concentrate should do one roll of film.

So am I correct in assuming that the most economical use of the developer would be to use whatever dilution gives me 650cc with at least 12ml of concentrate?

And if I want to use the unofficial dilution H (1:63) I would need to use at least 768ml of liquid in the tank, is that correct?

2. I don't see how you're arriving at your figures.
If you need 650 ml to fill your developing tank and you're using Dilution B (which is the most common), Dilution B is 1+31, so that's 650/32 = approx. 21 ml of concentrate and 630 ml water.
To use Dilution H, that would be 650/64 = approx. 11 ml of concentrate and 640 ml water.

3. I use HC 110 diluted 1:100, 20C, 26min total Dev time, 1min constant initial agitation, 10sec every 5 min thereafter, for HP5 and Tri-X exposed at asa400. I usually wait to fill my 5 reel tank, use 15ml of developer and 1500ml water. (Yes its close enough, lets not get anal about dilution ratios.)

4. Originally Posted by Terry Christian
I don't see how you're arriving at your figures.
If you need 650 ml to fill your developing tank and you're using Dilution B (which is the most common), Dilution B is 1+31, so that's 650/32 = approx. 21 ml of concentrate and 630 ml water.
To use Dilution H, that would be 650/64 = approx. 11 ml of concentrate and 640 ml water.
which figures do you see a problem with? Would I not need at least 12ml of concentrate to develop the two films?

5. 6 ml concentrate per roll is what Kodak recommends - once one reverse engineers their capacity recommendations.

This no doubt includes a significant margin for error.

There are many who indicate they have had success with less, but I wonder how many would either notice small amounts of localized exhaustion or report it when they encountered the problem.

The need for developer does vary with the type of photograph - high key photos of polar bears in snow storms developed for extra contrast need more than photographs with lots of moody shadows.

To the OP: Your calculation appears correct. It is probably the case that dilution H would also have enough capacity, as Terry Christian's calculation for dilution H indicates that almost 12 ml of concentrate would be in the tank. Of course, if your rolls have those polar bear shots on them ....

If I may suggest a compromise - Jason Brunner recommends a 1 + 49 dilution on his website. It works really well.

The site appears to be temporarily unavailable, but he added the same info to the APUG articles here: http://www.apug.org/forums/forum223/...de-simple.html

FWIW, Jason's 1 + 49 dilution is essentially the same as official dilution "E" (1 + 47).

6. okay that's great, thanks Matt. 1+49 / 1+47 seems like a good compromise between B and H

7. I recommend the following site for Hc-110 usage. http://www.covingtoninnovations.com/hc110/

8. I use about 50:1 dilution, and have gone down to 5ml per roll with no problems (250ml for one roll).

9. Originally Posted by BetterSense
I use about 50:1 dilution, and have gone down to 5ml per roll with no problems (250ml for one roll).
With my 1:100 dilution, I'm using 3ml per roll.

10. Originally Posted by BetterSense
I use about 50:1 dilution, and have gone down to 5ml per roll with no problems (250ml for one roll).
I do this too. I have never seen any problems.

Page 1 of 2 12 Last

 APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:
Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin