I can't sort this out in my head. In terms of ounces, what would be the equivalent dilution of HC110 1:31 from the stock solution if I wanted to arrive at the same dilution using the syrup straight from the bottle?
I would need enough total solution to submerge one sheet of 5x7 in an 8x10 tray. This would be for extended development with much reduced agitation.
Thanks in advance for your advice.
One laxative measure (30ml) of HC110 syrup into a 1 liter bottle of water (30+970 = 1:32).Originally Posted by Ben Calwell
Half a paper cup of the solution for each 4x5. One paper cup (150ml) for each 5x7.
You would find it difficult to measure 4.8ml syrup for the 150ml paper cup. Why bother.
Here's what I did last night with same, on the kitchen sink.
Last edited by cjbroadbent; 12-Dec-2010 at 15:35.
Ben,
First, are you sure you aren't confusing the stock solution, syrupy concentrate and Dilution B?
Dilution B is 1+31 from the thick syrupy concentrate or 1+7 from the stock solution.
The stock solution is 1+3 from the syrup concentrate.
So, in 4 ounces of stock there is 1 ounce of concentrate.
In 32 ounces of stock, there would be 8 ounces of concentrate + 24 ounces of water.
In 32 ounces of dilution B there would be 1 ounce concentrate + 31 ounces water or 4 ounces stock + 28 ounces water (=1+7 from stock).
So, if you do indeed want to dilute the equivalent of 1+31 from stock using a measure straight from the concentrate:
take 4 ounces of stock solution (which would contain 1 ounce of concentrate) and add that to 124 ounces of water to get 128 ounces of very dilute developer. That would be the same as taking 1 ounce of the syrupy concentrate and adding it directly to 127 ounces of water. However, Kodak doesn't list a 1+127 dilution from concentrate (or 1+31 dilution from stock) in their Technical Publication J-24.
I think Ben wants a 1:31 dilution from the stock solution which is already diluted from the syrup. And wants to make the working developer without having to go through making the stock solution. If this assuption is correct:
The stock solution is a 1:3 dilution 1 part HC100 3 parts water, so it it 1/4 strength of the syrup. His working developer is 1/32 strength of the stock, so his working developer is 1/128 strength of the syrup. this is a 1:127 dilution, 1 part syrup , 127 parts water. A syringe works well for me for measuring and transferring the syrup.
And you didn't believe your teachers in Algebra, you said why am I here I'll never use this stuf
Various dilutions (plus a lot of other info on HC-110) here: http://www.covingtoninnovations.com/hc110/
Dilutions are about midway down the page.
There's a bit of a trick in doing this degree of dilution directly from the syrupy stock.
I use a small polymethypentene graduate which seems less resistant to the syrup sticking than acrylic or polyethylene graduates. And I always save some of the dilution water for several rinses of any developer concentrate left in the graduates, giving a gentle swirl each time.
Curt has probably got it right. The Amphoto Data Guide says - " ... Working solutions can be prepared direcly from concentrate, or from a stock solution that is prepared by mixing one part concentrate with three parts water ..." then, "when working from stock solution ... dilution B is 1:7", (1:31 is dilution B on the usage sheet).
Yes, I want to duplicate the same highly diluted HC110 that Ansel Adams refers to in his book "The Negative," which he mixes, 1:31, from the STOCK solution, but using the thick syrup from the bottle.
Thanks again
I pretty much exclusively use HC110 for b/w. My permanent hc110 bookmark:
An Unofficial HC110 Resource Page
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