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Cold water extraction: Difference between revisions
>David Hedlund The most common use of CWE, among substance users, is to prepare injection solutions (see safer injection guide). |
>David Hedlund Heat, such as a heating mat, often evaporates a portion of the substance. |
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## Letting the glass jar stand for 2–3 days. For substances that will oxidize, just let it stand for just an hour to get rid of most of the sediment, then soak the semi-clear solution with a syringe and use a syringe filter to get rid of the final sediment. | ## Letting the glass jar stand for 2–3 days. For substances that will oxidize, just let it stand for just an hour to get rid of most of the sediment, then soak the semi-clear solution with a syringe and use a syringe filter to get rid of the final sediment. | ||
## Pouring the solution in a glass baking dish and carefully tint the solution to a corner where you soak it up with a large glass syringe. | ## Pouring the solution in a glass baking dish and carefully tint the solution to a corner where you soak it up with a large glass syringe. | ||
# Put the clear phase in a glass baking dish and let evaporate. Use several glass baking dishes to get more surface for quicker evaporation. | # Put the clear phase in a glass baking dish and let evaporate. Use several glass baking dishes to get more surface for quicker evaporation. Heat, such as a heating mat, often evaporates a portion of the substance. | ||
# The substance will stick to glass surface when dissolved with water, so use a baking scraper, and finish scraping the residues with a razor blade. | # The substance will stick to glass surface when dissolved with water, so use a baking scraper, and finish scraping the residues with a razor blade. | ||
# Repeat the steps with the sediment to precipitate the 10% water-soluble substances. | # Repeat the steps with the sediment to precipitate the 10% water-soluble substances. | ||
[[Category:Preparation]] | [[Category:Preparation]] | ||