A cold water extraction is a very simple method of separating two substances by water solubility.
When should I use a cold water extraction?
You should use a cold water extraction any time that the amount of filler in a prescription opiate would lead to an overdose if you took the dose of the opiate you intend on taking. The most common fillers are acetaminophen and acetylsalicylic acid (asprin). 4,000mg of acetaminophen is considered toxic and puts you at risk of liver damage, but the overdose threshold is around 8,000mg. 150-300mg of acetylsalicylic acid is considered dangerous, and the lethal dose is around 500mg.
How does it work?
Opiates - including fentanyl - are much more water soluble than the common fillers in prescription opiates, so when you use this method you will have water with the active ingredient in the pill, and solid filler which you can filter out. Cold water extractions will work to filter non-opiate material out of pressed pills.
Steps
1- Get hot water.
Water from the tap is fine, as long as it's potable. If the water is too hot to touch, it may break down the opiates. You will want around 5-10ml of water per pill, depending on the quantity of filler. Never use more than 500ml of water for a single dose.
2- Crush the Pill(s).
Crush up the pill(s) the best that you can in a separate container.
3. Mix Into Water.
Mix the crushed pill(s) into the warm water. The powder should be as evenly distributed as you can get it to be.
4. Chill the Solution
Put the mixture in the freezer for at least 20 minutes, but don't wait long enough for it to freeze
5. Strain
The solid leftover is the filler you don't want, and the opiates are dissolved into the water. You can use a coffee filter or other similar object to strain out the filler material. Squeeze lightly to get all the liquid out of the filter.
