Step 5 - Reduce

Step 5 - Reduce


Final Reduction. You should have a bowl of dissolved oils in 95% Ethanol. Using a double boiler here will hold the temperature to that of boiling water, IE, 212f. This way, the alcohol will boil off, then any remaining water, leaving you the final clean oil.


  1. Place the wash in a small stainless steel bowl. Use a small bowl that will make it easy to squeegee clean afterwards. If La Brea, add a couple drops of MCT oil to the wash to make the resins pliable. La Brea is very thick and sticky. Using MCT will reduce the viscosity of the final oil.

  2. Boil it down. Boil off the ethanol then water. The alcohol boils off at 82c/180f, water at 100c/212f. C02 bubbles at temperatures over 104c/220f. Stop when you see C02 bubbles. The alcohol and water rapidly boil off with large bubbling. Once there is more oil than water, boiling slows. Large bubbles come from water vapor, fine small bubbles come from C02.

  3. Small bubbling indicates decarbing has begun. This happens above 104c/220f. Watch out for spiking temperatures once the water is gone. Temps will spike to 148c/300f and higher in seconds.

  4. Decarbing is best done before making oil. If you must, you may decarb now. Try your best to hold a constant temperature for many minutes. Its not easy. Place the bowl on heat source. Run until bubbling stops. C02 bubbles off as the conversion happens. Do not walk away. Heat control is crucial. Stay focused on controlling the temperature until bubbling stops. WARNING: Heat will instantly spike. This is the most common point of failure in making RSO, by allowing heat to spike. Impurities in the oil may start smoking at temps as low as 115c/240f. WARNING: Monitor decarbing closely. Keep the temperature below 120c/250f by lifting the bowl when needed. Use a digital or candy thermometer to monitor the temperature. Temperature over time determine the rate of decarbing.

DONE! You now have oil! Your medicine is ready for application. From plant to oil now takes a few hours.


Tips and Tools

Tip: Water saturated with salt has a boiling point of 227f. You can bring the boiling temperature of the base boiler up to 227f by boiling brine. Downside is, brine dissolves aluminum and pits stainless steel. Best to dedicate a stainless steel pot as the bottom boiler and always use it for boiling brine. Second downside is, at boiling temperatures, the water spits dry into salt crystals so you will have a mess on your hands afterwards.


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WARNING: Never distill alcohol near open flame. Alcohol vapors are highly flammable so always distill in well ventilated spaces.

This oil is appropriate for oral ingesting and vaping. Due to the potential of residual salts, do not torch this oil. Torch temperatures can reach over 760c/1400f and can vaporize any residual salts.

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