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Drying and humidity standardization of substances
Drying
- Weight the substance on a weighing scale, and write down the value.
- If possible, make a fine powder by rubbing the substance through a coarse strainer, and then with a fine strainer, to speed up the drying process.
- Dry the chemical with silica gel in a sealed container.
- 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.
- Weight the substance again, and divide it with the weight in step 1, to calculate the loss of weight in percentage.
Expected loss of substances
Cannabis
- 10-20%.
Powders
- 40% weight from large moist lumps.
- 50% or more from a paste.