Cold water extraction: Difference between revisions

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[https://en.wikipedia.org/wiki/Cold_water_extraction Cold water extraction] (CWE) is useful to filter cutting agent that doesn't dissolve in water. For example, caffeine is a common cutting agent with poor water solubility.

==For a single dose==

==Preparation==

* If you need to calculate the loss of drying: Dry the substance, see [[drying and humidity standardization of substances]]. Otherwise, just use a coarse strainer, and then a fine strainer.

==Cold water extraction==

===For a single dose===

See [[volumetric liquid dosing]] and [[safer injection guide]]

==For a whole batch==

===For a whole batch===

{{GenericPanel/warning | title=The potency of the dried weight before and after the extraction can differ several folds (see the example section below). So it's extra important to [[dosage]] properly after the extraction! Avoid eye balling, since a lot of street drugs can be overwhelmingly potent after the majority of the cutting agents have been removed. Avoid extraction altogether if you don't know how to dose it.}}

For improved extraction, it's recommended to do an acetone wash (not covered in this guide) before you do the CWE, but it is not required.

~~# Weight the substance, and write down the value.~~

~~# For lumped substances: Break them apart, and sift the powder with a coarse strainer, and then with a fine strainer, to make them easy to dissolve.~~

# Conditionally, dry the substance to calculate how solvents/water that the batch contained. Use completely dried silica gel (can be heat in microwave for 5 minutes at 800W) in a sealed container, and weigh samples until they don't lose any weight, which indicates that it's completely dry. Expect a loss of up to 40% weight from large moist lumps, and 50% or more from a paste.

# Add the fine powder to a glass jar, and add 10 times more boiling water than the quantity of the substance, and shake well for 10 seconds. This should precipitate the soluble substances in the water.

# Let the water cool down to room temperature.

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# A main advantage of extraction is to calculate how many percentages that have been cut. However, it is not uncommon that the purity will be twice as strong. To avoid accidents from impulsive eye balling, you can cut it will glucose powder which is also water-soluble.

===Example purity after extraction===

====Example purity after extraction====

A moist lump that weighed a one gram.

# 40% loss in drying.

# 15% loss in acetone wash.

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Note that this doesn't include water-soluble impurities.

[[Category:~~Preparation~~]]

[[Category:General extraction]]

@@ Line 1: / Line 1: @@
 [https://en.wikipedia.org/wiki/Cold_water_extraction Cold water extraction] (CWE) is useful to filter cutting agent that doesn't dissolve in water. For example, caffeine is a common cutting agent with poor water solubility.
-==For a single dose==
+==Preparation==
+* If you need to calculate the loss of drying: Dry the substance, see [[drying and humidity standardization of substances]]. Otherwise, just use a coarse strainer, and then a fine strainer.
+==Cold water extraction==
+===For a single dose===
 See [[volumetric liquid dosing]] and [[safer injection guide]]
-==For a whole batch==
+===For a whole batch===
 {{GenericPanel/warning | title=The potency of the dried weight before and after the extraction can differ several folds (see the example section below). So it's extra important to [[dosage]] properly after the extraction! Avoid eye balling, since a lot of street drugs can be overwhelmingly potent after the majority of the cutting agents have been removed. Avoid extraction altogether if you don't know how to dose it.}}
 For improved extraction, it's recommended to do an acetone wash (not covered in this guide) before you do the CWE, but it is not required.
-# Weight the substance, and write down the value.
-# For lumped substances: Break them apart, and sift the powder with a coarse strainer, and then with a fine strainer, to make them easy to dissolve.
-# Conditionally, dry the substance to calculate how solvents/water that the batch contained. Use completely dried silica gel (can be heat in microwave for 5 minutes at 800W) in a sealed container, and weigh samples until they don't lose any weight, which indicates that it's completely dry. Expect a loss of up to 40% weight from large moist lumps, and 50% or more from a paste.
 # Add the fine powder to a glass jar, and add 10 times more boiling water than the quantity of the substance, and shake well for 10 seconds. This should precipitate the soluble substances in the water.
 # Let the water cool down to room temperature.
@@ Line 24: / Line 26: @@
 # A main advantage of extraction is to calculate how many percentages that have been cut. However, it is not uncommon that the purity will be twice as strong. To avoid accidents from impulsive eye balling, you can cut it will glucose powder which is also water-soluble.
-===Example purity after extraction===
+====Example purity after extraction====
+A moist lump that weighed a one gram.
 # 40% loss in drying.
 # 15% loss in acetone wash.
@@ Line 34: / Line 38: @@
 Note that this doesn't include water-soluble impurities.
-[[Category:Preparation]]
+[[Category:General extraction]]