Dilution of HC 110

[Wee Gillis]

I have occasion to use again Kodak's HC110 developer. When I last used it I remember diluting the bottle from the shelf something like 1:31 to give the equivilant of working dilution B. Anyone else out there done this? Have I got my math correct or am I slipping into some age induced funk? Thanks for the comments.

Scott

 

[ann]

yep that is correct

 

[yeknom02]

Yes, I use a syringe to measure out the 1:31 dilution for "B" or 1:63 dilution for "H." In either case, I add the syrup, then part of the water and really swish it around the cylinder until the syrup starts to dissolve from the bottom. Then I pour the rest of the water in. This is because when I first diluted straight from the syrup, it didn't dissolve completely.

 

[fschifano]

Yes, I use a syringe to measure out the 1:31 dilution for "B" or 1:63 dilution for "H." In either case, I add the syrup, then part of the water and really swish it around the cylinder until the syrup starts to dissolve from the bottom. Then I pour the rest of the water in. This is because when I first diluted straight from the syrup, it didn't dissolve completely.

easier if you inject the syrup into the water then draw a few syringe fulls back and forth to clear the syringe...

 

[Lee L]

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

Lee

 

[Gabino]

I just did my first development with HC110 tonight !. The negative is drying but i have the dilution fresh in my mind. yes, 1:31 is correct when using the concentrate/syrup. When you use the stock solution (Dilution A, which is by diluting syrup at 1:3, making 1/2 gallon of solution), you then dilute at 1:7. In my case, 120 film, 1:7, was 63 mL of stock solution plus 437 mL of water.

 

[Wee Gillis]

My thanks to everyone for the quick responses. I may be getting older but I do remember some of the old tricks. Thanks again.

Scott

 

[Dan Daniel]

The silly ratios aren't sacred. I use 1:100 and 1:50 ratios, avoiding numbers like 437. It's not hard to look at charts for 1:31 and 1:48 and 1:64 and guess a good first batch time.

 

[Lee L]

Many of the dilutions work out to standard quantities in US volumetric ounces for which they were designed, making them easy to measure in that system.

In ounces:
1:15 = 16 parts = 1/2 quart
1:31 = 32 parts = 1 quart
1:47 = 48 parts = 1 1/2 quarts
1:63 = 64 parts = 2 quarts (unofficial Dilution H)
Dump in one ounce concentrate and top off to the standard volumes. Easy.

As per Covington the in link I posted earlier, Dilutions C, D, and E were designed to match the developing times of DK-50, DK-50 1:1, and DK-50 1:2 with sheet films. They are all multiples of 20 parts total, separated by a factor of 2.
1:19 = 20 parts
1:39 = 40 parts
1:79 = 80 parts

Unofficial Dilution G is another multiple of these dilutions.
1:119 = 120 parts

It's only when converting these ratios exactly to metric final volumes that the ratios appear irrational or difficult to measure. There's nothing stopping a reasonably resourceful person from making up their own rational metric scheme and finding easier to measure ratios as Dan has done. Many other folks have done that. See Arnold Gassan's work in the 1970's for one such scheme. It's been posted here on APUG.

Lee

 

[MattKing]

I've been using Jason Brunner's 1 + 49 recommendation, and I like it:

Jason Brunner - HC-110 made simple

FWIW, to all intents and purposes this is equivalent to the rarely seen dilution "E" (1 + 47)

PS: I'm in the midst of a work in progress - I'm adjusting the times recommended by Jason to take into account a rotary processing regimen

 

[photovestad]

"PS: I'm in the midst of a work in progress - I'm adjusting the times recommended by Jason to take into account a rotary processing regimen"


I'd be interested in how that works out. I've been using JB's 1:49 and drum processing @ time -20% to process 4x5 and getting results that seem fine to me but as a total rooky I don't have the depth of experience or knowledge to know whether my "acceptable" would be a more knowledgeable person's borderline success.

 

[MattKing]

"PS: I'm in the midst of a work in progress - I'm adjusting the times recommended by Jason to take into account a rotary processing regimen"


I'd be interested in how that works out. I've been using JB's 1:49 and drum processing @ time -20% to process 4x5 and getting results that seem fine to me but as a total rooky I don't have the depth of experience or knowledge to know whether my "acceptable" would be a more knowledgeable person's borderline success.

Peter:

I'm not sure that my results will help you a lot, because I'm using rotary processing for roll films.

That being said, I am getting results (initially with Plus-X, and more recently with TMY) that are about half way between yours and Jason's. I am, however, using a three minute pre-soak.