User:Oskykins/Responsible use: Difference between revisions

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*erowid: Some people figure if they buy a quantity of material from a vendor or individual, the amount of material they receive is known. This Is Not The Case. For instance with legal, grey market, or research chemicals, it is not uncommon for a vendor to provide significantly more or less material than the amount ordered. One individual describes ordering 500 mg of a compound only to measure it when it arrived, finding 1000 mg instead. If s/he had assumed that the starting material was 500 mg, and proceeded to use a liquid measurement technique to measure individual doses, those doses would have been twice as strong as intended. https://www.erowid.org/psychoactives/dose/dose_info1.shtml

* NOTE: If you a looking for a digital scale that measures milligrams, it must measure to at least .001g. A milligram is 1/1000 of a gram. A scale that measures to only 0.1g will not measure milligrams accurately.

* Xorkoth: If you weigh out, say, 40mg of something on a scale that has, say, +/-3mg accuracy, then your final amount is going to be between 37 and 43mg. For a single dose of something like DOC, this is a vastly unacceptable variation. However if you put that amount in solution at 1mg/mL (or whatever concentration, it's just 1mg/mL makes the numbers easier for examples and is what I generally do so dosing small increments is easier with a 1mL syringe - I can get 100mcg accuracy), then you divide that error across all your doses. So each mL of solution would have between 0.925mg and 1.075mg, which is quite an acceptable variation for nearly anything (even LSD, where .1mL would be between 92.5mcg and 107.5mcg). And yes, to the above post, scales tend to get more accurate the more you put on them to start, until you get close to the max. For this reason, I always put the weighing tray and sometimes even an additional card or something on mine before weighing, without taring. Let's say it reads 5023mg with the tray/etc on it... then if I wanted to weigh out 15mg, I'd put substance on until the scale read 5037mg. And I always measure a few times to make sure the first one was right.

====Instruction manual====

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 *erowid: Some people figure if they buy a quantity of material from a vendor or individual, the amount of material they receive is known. This Is Not The Case. For instance with legal, grey market, or research chemicals, it is not uncommon for a vendor to provide significantly more or less material than the amount ordered. One individual describes ordering 500 mg of a compound only to measure it when it arrived, finding 1000 mg instead. If s/he had assumed that the starting material was 500 mg, and proceeded to use a liquid measurement technique to measure individual doses, those doses would have been twice as strong as intended. https://www.erowid.org/psychoactives/dose/dose_info1.shtml
 * NOTE: If you a looking for a digital scale that measures milligrams, it must measure to at least .001g. A milligram is 1/1000 of a gram. A scale that measures to only 0.1g will not measure milligrams accurately.
+* Xorkoth:     If you weigh out, say, 40mg of something on a scale that has, say, +/-3mg accuracy, then your final amount is going to be between 37 and 43mg. For a single dose of something like DOC, this is a vastly unacceptable variation. However if you put that amount in solution at 1mg/mL (or whatever concentration, it's just 1mg/mL makes the numbers easier for examples and is what I generally do so dosing small increments is easier with a 1mL syringe - I can get 100mcg accuracy), then you divide that error across all your doses. So each mL of solution would have between 0.925mg and 1.075mg, which is quite an acceptable variation for nearly anything (even LSD, where .1mL would be between 92.5mcg and 107.5mcg). And yes, to the above post, scales tend to get more accurate the more you put on them to start, until you get close to the max. For this reason, I always put the weighing tray and sometimes even an additional card or something on mine before weighing, without taring. Let's say it reads 5023mg with the tray/etc on it... then if I wanted to weigh out 15mg, I'd put substance on until the scale read 5037mg. And I always measure a few times to make sure the first one was right.
 ====Instruction manual====