If you want to make RSO oil, the most important purchase is food-grade ethanol, not isopropyl alcohol. Buy cannabis with high THC and no mold. You also need a double boiler or rice cooker, a thermometer, unbleached coffee filters, and glass syringes for storage. Safety gear includes nitrile gloves, a respirator, and a fire extinguisher. Convenience drives many cannabis purchases, but making RSO at home gives you control over solvent and plant quality.
What to Look For
Focus on three categories: solvent, cannabis, and equipment.
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- Solvent: Food-grade ethanol at 190 proof or higher. Everclear is a common choice. Avoid isopropyl alcohol, acetone, and butane.
- Cannabis: High-THC flower or trim. Check for mold, mildew, and pesticides. Fresh material works best.
- Equipment: Double boiler, candy thermometer, glass jars, unbleached coffee filters, glass syringes, and a glass storage jar.
- Safety: Respirator with organic vapor cartridges, nitrile gloves, fire extinguisher, and a well-ventilated space.
Parameter Bands
These ranges come from common home extraction methods. Adjust based on your setup.
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- Cannabis to solvent ratio: 1 part cannabis to 1 to 2 parts ethanol by volume.
- Decarboxylation: 240°F (115°C) for 30 to 40 minutes.
- Wash time: 3 to 5 minutes. Longer washes pull chlorophyll and make the oil harsh.
- Evaporation: 170 to 180°F (77 to 82°C) for ethanol. Never exceed 200°F.
Pitfalls
- Using isopropyl alcohol. It is toxic and not for consumption.
- Working near an open flame. Use electric heat only.
- Skipping decarboxylation. THC needs heat to activate.
- Overheating the oil. High heat burns off cannabinoids.
- Poor filtration. Plant matter ruins taste and potency.
- Not freezing cannabis and solvent. Cold reduces chlorophyll pickup.
FAQ
Can I use Everclear?
Yes. Everclear is food-grade ethanol. 190 proof is ideal.
How long does the process take?
From start to finish, plan for 2 to 4 hours.
Is RSO legal?
Laws vary by state. Check your local rules before making or using RSO.
Can I buy RSO instead of making it?
Some dispensaries sell RSO. If convenience is your priority, buying may be simpler. But making it yourself lets you control the inputs.