I have some bottles of HC110 made by SINO and TETENAL
This is a list of contents, not a formula. They are not the same. The proportions of the organic alkalis are different and the principal solvent in the Sino version is water which contains sulfite, not glycol containing liquid sulfite as an organic complex. Measure the viscosity, or the sodium content. The proportions of catechol (1,2 benzene diol) and hydroquinone (1,4 benzene diol) also differ.
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The Sino Promise bottle I had was definitely the new formulation with much lesser viscosity. Sino might have packaged or labelled the end of the Tetenal manufacturing run, but I doubt they had the technology to manufacture the old formula. If you really want to know, check the water content of the developer you have using copper (II) sulfate or cobalt chloride.I totally got your point here that the OLD and NEW formulars are different.
But the key point here is: we are not sure whether SINO was making the OLD for NEW formula.
Looking at the viscosity I found the SINO one and TETENAL one are no different and it's quite thick.
That's why i SUSPECTED that it's the old version.
A guy here also share the same thought with me.
Kodak yellow HC-110 in round bottle - 2022 - Sino Promise, Made in China
{Moderator's Note: for discussion about the previous, 2019 version of HC-110, and its differences from what preceded it, you may wish to revue this thread: https://www.photrio.com/forum/threads/new-hc-110-developer-not-the-same.176138/} Hello guys. I just bought a bottle of Kodak HC-110 in...
My German made HC-110 for SINO is also the last batch of the old formular in old shape bottle that I have (EXP 2023),
how long does your stock mixture last though? you know, the "mix x amount of concentrate with y amount of water. then use the below chart to make the working solution"I am currently using Ilfotec HC (1 litre bottle decanted into 100ml medicine bottles) and it is 3 years old with no sign of deterioration. I use Calpol childrens paracetamol bottles and they come with an oral medicine syringe and fitted stopper.
Untitled_254019GB by E.J. Bragg, on Flickr
Most users these days omit making a stock solution and measure syrupy developers using a syringe and dilute directly from syrup. That way the longevity of the stock doesn’t matter.
what, and not follow the ilford directions... thats heresy i say, heresy. Ill bring the torches. someone else needs to bring the pitchforks
You are following Ilford’s directions, just skipping the less stable stock solution.
Don't waste the pitch, it's great for making your developer syrupy!
all of ilford directions for making that final working solution come FROM diluting the stock solution. I know its popular for HC-110 users to do straight from syrup but mathematically it only works for specific dilutions.
The HC-110 will work. Give it away if you don’t want it, maybe, that way it’s not wasted.
Ok, thanks. My opened bottle of HC-110 is maybe more than 5 years old. It's when they changed the formula. I got a bottle of the old formula then, but don't use it much. My fave developer (Clayton F76) has a pretty short shelf life. That's why I keep Rodinal and HC-110 around. If the Hc-100 is still good, I'll just use it up.
I am still using a bottle of HC-110 from 1987. It looks like raspberry jelly/jell-o. It has lost maybe 5-10% activity compared to new. The old formula lasts a _long_ time.
