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.
Humidity standardization
- To make it simple, dry the substance first.
- Calculate how much water you need to add (see the below section).
- For small batches, pour the water in folded toilet paper, and attach the paper at the inside of a lid for a sealed container, for example, a mason jar.
- Add a hygrometer to the container, to monitor the relative humidity.
- Store until the toilet paper is dry.
How to calculate the amount of water
Add x% of the desired weight in water to y weight substance: (y+(y*x))*x
- Example: To get 10% humidity for 100 g dry herb, add 11 g water: (100+(100*0.1))*0.1 = 11