HC-110

[geraldine_pugh]

i'M having a nightmare with Hc110 and no time to look thru the archives. I

just want someone to give me a foolproof dilution and development time (from

concentrate if possible)I'm teaching kids and developing 2 rolls at a time in

plastic tanks. I don't need perfection, just good negatives. please help!

[Rob F.]

Normal dilution is 1:31. So 1 oz. concentrate to 31 oz. water makes one quart of working solution. Or measure 1/4 oz. to make 8 ounces for an 8 oz. tank, etc. Development time depends on which film you are using. Check the Massive Development Chart on the digitaltruth website.

[jim_appleyard]

Good info here:http://www.covingtoninnovations.com/hc110/index.html

[stefan heymann]

Geraldine, 1+31 from concentrate is the usual dilution (named "B"). When you teach kids, you probably use Kodak Tri-X (400TX) or Ilford HP5 Plus, development time for these is 6.5 minutes at 20C/68F, with 3 inversions every minute. That should give you good negatives to work with.

 

Another tip: Set the ISO setting of your light meter to 250 or 320 instead of 400, this will give more detail in shadow areas.

[paul_viapiano]

Kodak's time for Dilution B is 3 3/4 minutes, but that can be disastrous with tight time tolerances in pouring chemicals in and out of the tank.

 

Try Dilution H at twice the dilution of "B" and dev for twice the Kodak time, which would total 7 1/2 minutes.

[frank.schifano]

HC-110 at 1+31 is sure enough easy to do, and will give you decent negatives. But as Paul wrote, the development times for HC-110 at this dilution are very short at 68 deg. F. Development times are even shorter if the solution is warmer. With inexperienced kids doing the work short development times will almost always give inconsistent results. Use dilution H, that's 1+63 or half strength of dilution B. Try it out on a roll yourself before you present it to the kids to verify that you've got it right.

[nigel d]

See http://www.kodak.com/global/en/professional/support/techPubs/j24/j24.jhtml?id=0.1.20.14.18.14.7.22.14&lc=en

[dford]

500ml of water and 8ml of syrup at 68 degrees f for 9 and a half minutes. Agitation once a minute for 5 seconds. This dev time would be for 400 speed film.

[mark_punch]

I would second the recommendation for dilution H....1/63. It works very well for Tri-X or Neopan 400, and the time is about 9 to 9&1/2 mins @ 68 degrees F. I've been using this for years with great , consistent results.