Darkroom Supplies - Kodak HC-110 BW Developer (1 Liter Concentrate)
KODAK PROFESSIONAL HC-110 Developer is a highly concentrated liquid developer. It is intended for use with a variety of black-and-white films, some graphic-arts films, and some glass plates.
1 liquid bottle of D-76 powder to make 16 liters
Info on mixing and usage - http://imaging.kodakalaris.com/sites/prod/files/files/resources/j24.pdf
Leslie Lazenby's comments and tips on Kodak HC-110 -
"It comes supplied as a thick liquid syrup. Even though you can mix it to a stock solution further dilution is needed before using. Most find it easier to just mix it for a one shot working dilution right before use. A nice advantage when you use these liquid supplied developers is it is so easy to quickly get to your proper processing temperature. HC-110's selling points are ease of use, versatility, and reliability. The concentrate keeps for years; (4 to 5 years air tight) Buy a bottle and fill with marbles as you use it or pour some into smaller bottles and cap then use out of only one until it's gone. All types of black-and-white film can be developed with HC-110, and results are consistent. Once again Kodak made the following comparison to their own D-76, they indicate that HC-110 (dilution B) produces, slightly less shadow detail or true film speed, slightly finer grain and slightly lower acutance. Apparently, HC-110 has somewhat more solvent action than D-76, but less than Xtol. Opinions differ about the effect of HC-110 on grain, some report coarser grain than with D-76 and others report finer grain. In reality this is probably a function of dilution and agitation rather than the nature of the developer. Where HC-110 really shines for me is with old outdated films, it gives surprisingly little base fog even with very prolonged development. Old films have their fair share of age fog and HC-110 gives me a better chance of a useable negative. Like Rodinal, HC-110 keeps very well and gives very reproducible results. It is a good choice when failure would be costly."
"HC-110 developer can be mixed two ways. Mix a stock from the syrup, then mix a working solution from this stock or mix a working solution from the syrup. Syrup? That's the term used for the syrupy product as it comes directly from the bottle. I'll refer to the three as syrup, stock and working.
Since the syrup has such a long shelf life, years, most people just mix syrup to working solution. With HC110 you always develop with working solution, unlike some developers which can use both stock and working.
The first thing you will notice when looking up your developing times with HC-110 is there are many options, dilutions, these are referred to with alphabetic nomenclature. Dilution B is very popular, here is how it is mixed. Dilution B is mixed 1:31 for your working solution. One part syrup is mixed with 31 parts of water. Example, if I mixed 1 ounce of syrup I would add 31 ounces of water, this gives me 32 ounces of working solution, and if you mixed it at the proper temperature you are ready to go. If this is too much or too little for your film tank you can mix it by starting with the amount you need. Again this is from syrup, and we will work in milliliters, ml, this time. Dilution B is 1:31 added together is 32, 32 parts. If you need 300ml for your tank divided 300 ÷ 32. This is 9.375ml, your 1 unit, and 9.375 x 31 = 290.6 is your water units, thus added together is 300ml of Dilution B working solution. You should always use a minimum of 6 ml syrup, even it it makes more than you need.
These working solutions are consider one shot so once mixed and used dispose of it and do not re-use. Also note the dilution examples given above are for HC110 US product, the European HC110 is supplied in a different syrup concentration."