Mixing D76 Options?Since the

Besk · Jan 21, 2017

I once worked in labs where we had to take samples of powders. There is a method of deviding

grahamp said:
I used to regularly sub-sample ground rock powder for analysis. Obviously we went to a lot of trouble to test our methods as being statistically viable. The key element was to endure (oops 'ensure', though 'endure' is not a bad description!) thorough mixing. This was reasonably reliable with rock powders ground to a common particle size, though the mass differences in the minerals did cause separation over time if just left on the shelf. It is the thorough mixing which is the problem - the splitting is easy enough. (I'll happily discuss this off-thread).

The reason I would not advocate splitting powders in this case is that it is not necessary. A couple of gallons of stock solution is not that big a problem.

I completely agree with all of the above as I was trained to do the same i.e. sub-sample powders.

Gerald C Koch · Jan 25, 2017

lhuhn said:
I am embarrassed to admit that I rechecked the mixing instructions and i was incorrect

Don't feel bad I've had more than my share of mistakes in the past few months. I tend to blame it on a misalignment of the planets.

Wallendo · Jan 25, 2017

I find it easiest to make D76 by buying a 1 gallon container of distilled water - it gives me the right amount of water and a container to mix it in.
I recently decided to try XTOL, but can't find any containers around the house large enough to mix it in. Some of the suggestions earlier in this thread may come in handy.

RalphLambrecht · Jan 25, 2017

lhuhn said:
I searched the threads but did not find the answer to the following question.

Since D76 is packaged to be mixed in 1.25 gallons of water and 1.25 gallon containers seem to be non-existent, I was wondering what people are doing to mix their developer. I have considered using 1 gallon or 1/2 gallon bottles and weighing out the powder proportionately, and I have considered mixing the stock solution at a higher concentration to fit a 1 gallon container and adjusting the working solution. The former seems to be the best solution to me. Any suggestions?

I mix my own D-76 from raw chemicals but ,I mix a stock solution at double concentration and then mix it 1+1 with plain water to a working solution. This allows me to get a working solution at just the right temperature every time.

Mixing D76 Options?Since the

Besk

Gerald C Koch

Wallendo

RalphLambrecht

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