Al Kaplan
Veteran
HC-110 is usually diluted in ratios like 1:31 , 1:15, etc. to make quarts and pints of working solution. Rodinol is usually diluted in decimal dilutions, such as 1:100 or 1:50.
Has anybody tried HC:110 at 1:50 or 1:100? How did you adjust your developing time? Is 1:100 too dilute for good results?
Has anybody tried HC:110 at 1:50 or 1:100? How did you adjust your developing time? Is 1:100 too dilute for good results?
cjm
Well-known
Wow, Al Kalpan asking for developing advice!
I've used 1:63 (Dilution H) with good results and there is plenty of information on the web about development times in dilution H.
Sorry I can't be of any help with the 1:50 or 1:100. IIRC, Gene Wilburn (RFF member) has experience with 1:100. You may want to contact him.
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capitalK
Warrior Poet :P
I did some TRI-X 1+49 for 8 minutes yesterday. I should have written down the link I got the times from. They scanned pretty flat but with a lot of highlight detail.
Al Kaplan
Veteran
Actually I'm toying with the idea of just getting a whole mess of Diafine, but my local shop told me that would be special order. They're just carrying D-76 and HC-110 these days, and sometimes they don't have both on the shelves at the same time. I have bunches of packs of D-76 on hand though, and I picked up a bottle of HC-110 to play with. I guess that I can try to extrapolate times from the published data. I should be close enough on the first try, then fine tune as needed. Thanks for the link.
capitalK
Warrior Poet :P
I did some digging and found the link I was referring to: HC-110 made simple:
http://www.jasonbrunner.com/hc110.html
http://www.jasonbrunner.com/hc110.html
capitalK
Warrior Poet :P
Al Kaplan
Veteran
OK! Fantastic! Thanks , capitalK. This should get me started.
sevo
Fokutorendaburando
Haven't ever tried it on HC, but with other developers. You can approximate times for intermediate dilutions or sensitivities/contrast by drawing the known values on coordinate paper and connecting them with lines or, where you have enough values to predict one, with a curve (the function usually is reasonably close to parabolic for medium values and will only get chaotic at the extremes where other factors like pre-soak, depletion and self-moderation become relevant). Lines are good enough to start with, and will rarely be more than 20% off.
There probably are better computational methods, but I am too lazy to work them out.
Sevo
delft
Established
One of the nice things about HC110 is, that the development times changes more or less proportional to the dilution. Double your dilution, double your time. So 1:50 would give about 80% of the time for 1:64, or 1.6 times that for 1:32 and 1:100 would give 1.6 times the one for 1:64. There is a suggested minimum amount of sirup per film (6 ml I think).
Greetings,
Dirk
Greetings,
Dirk
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srtiwari
Daktari
Al,
This one is entertaining though it does not directly address the Decimal issue...
http://www.mironchuk.com/hc-110.html
Subhash
This one is entertaining though it does not directly address the Decimal issue...
http://www.mironchuk.com/hc-110.html
Subhash
Al Kaplan
Veteran
Thanks, everyone! Subhash, I haven't given up on driving up to Vero Beach. It WILL happen! I want to make the trip before I have to mow the lawn. It RAINED today here in North Miami for the first time in months.
Bob Michaels
nobody special
Al: I find the key is to use either metric or oz. of final solution to simplify the math. Then I just move up to some volume that makes the math easy and end up pouring out $.02 worth of developer final solution when the tank is full.
BTW, we finally hit 20 degree C tap water here in Central FL. has not happened in several years. No need to use ice cubes to cool things down. I bet you never get tap water that cool down there in S FL. You have probably just dialed in 75 F degrees back when the earth was cooling.
I dialed in HC110 at 1:64 years ago for me. But it would have been just as easy to do 1:50 since the dilution / time seem linear. I am sure 1:100 would work if you could live with a 13 minute developing time.
I swear I am going to get back down to S FL one of these days. I will give you a heads up if I have advance notice and we can meet at that Starbucks.
BTW, we finally hit 20 degree C tap water here in Central FL. has not happened in several years. No need to use ice cubes to cool things down. I bet you never get tap water that cool down there in S FL. You have probably just dialed in 75 F degrees back when the earth was cooling.
I dialed in HC110 at 1:64 years ago for me. But it would have been just as easy to do 1:50 since the dilution / time seem linear. I am sure 1:100 would work if you could live with a 13 minute developing time.
I swear I am going to get back down to S FL one of these days. I will give you a heads up if I have advance notice and we can meet at that Starbucks.
John Bragg
Well-known
I have found that the easy way to get Dilution H is to shoot 8 ml of syrup into the jug with a syringe and add water to make final volume of 500 ml... Near as damn it.
Jason Sprenger
Well-known
Ansel Adams used the dilution 1:119 for 18mins with Tri-X 320 Pro in 4x5. I'd suppose that 1:100 would work, though I've not tried anything that dilute in 35mm myself.