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#1
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phenidone concentrate
How concentrated can I make a phenidone /alcohol solution? I hate the
smell of the alcohol (but I love the way phenidone dissolves in it) so i would like to have as little as possible in my developers. Measuring smaller amounts of a more concentrated solution is not a problem. Thanks |
#2
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phenidone concentrate
You can make a 10% solution of phenidone in propylene glycol that has
no smell and will last forever on the shelf. Jay |
#3
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phenidone concentrate
Joe:
I gave Patrick Dignan's suggested method a try. In 1 liter of water dissolve 1 gram of phenidone plus 5 grams of sodium bisulfite. I made one change, I put it all in 250 ml., 8 ounces. I use a splits method for portioning out stock or concentrates. At start that one 250 ml went into two 125 ml bottles. The first split after compounding would be a 125 into 2, 62.5 ml bottles. A second split into 2, 1 ounce bottles brings the amount to 1/8 gram phenidone. All contents are still at stock or concentrate strength and full to the brim. Dan |
#4
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phenidone concentrate
Will propylene glycol affect the pH of a solution it's added to? I think the
alcohol won't. -Lew wrote in message ups.com... You can make a 10% solution of phenidone in propylene glycol that has no smell and will last forever on the shelf. Jay |
#5
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phenidone concentrate
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#6
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phenidone concentrate
I use 90% alcohol as my Phenidone stock mixed in 100 ml (1% solution)
sizes, which is enough to do about 50 liters of developer. While others tout the greater keeping properties of glycol, I have found that my 100 ml bottle of stock will keep its potency for about six months. I can live with having to mix stock twice a year (how long does it take to throw a 1/2 teaspoon of Phenidone into a beaker of 100 ml. alcohol?) in order to realize the huge savings in cost and the convenience of being able to get my alcohol at the grocery store. Larry wrote: You can make a 10% solution of phenidone in propylene glycol that has no smell and will last forever on the shelf. Jay |
#7
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phenidone concentrate
Joe wrote: How concentrated can I make a phenidone /alcohol solution? I hate the smell of the alcohol (but I love the way phenidone dissolves in it) so i would like to have as little as possible in my developers. Measuring smaller amounts of a more concentrated solution is not a problem. Thanks well, I got .5 gram into 25 ml so far. Should I keep going? |
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