Water Activity (aW <= 0.65) & Cure Mold-Risk Calculator.
Compute equilibrium Water Activity (aW), Loss-on-Drying moisture percentage, wet-to-dry cured harvest yield, and Botrytis or Aspergillus flavus germination risk.
Harvest Water Activity (aW <= 0.65), Moisture Loss & Aspergillus Risk Calculator
Compute equilibrium Water Activity (aW), Loss-on-Drying moisture percentage, wet-to-dry cured harvest weight, and Botrytis / Aspergillus flavus mycotoxin germination risk.
Cure Equilibrium & Stoichiometric Reference Table
| Starting Flower Weight | Raw THCA % | Total Raw THCA (mg) | Max Theoretical THC (0.877x) | Controlled PID + MCT Oil (~83% Net) | Open Kitchen Oven + Butter (~59% Net) | Per Serving (24 Portions) |
|---|---|---|---|---|---|---|
| 3.5 g (Eighth) | 18% THCA | 630 mg | 552.5 mg | 457.5 mg THC | 328.2 mg THC | 19.1 mg (PID) vs 13.7 mg (Oven) |
| 3.5 g (Eighth) | 24% THCA | 840 mg | 736.7 mg | 610.0 mg THC | 437.6 mg THC | 25.4 mg (PID) vs 18.2 mg (Oven) |
| 7.0 g (Quarter) | 20% THCA | 1,400 mg | 1,227.8 mg | 1,016.6 mg THC | 729.3 mg THC | 42.4 mg (PID) vs 30.4 mg (Oven) |
| 7.0 g (Quarter) | 22% THCA | 1,540 mg | 1,350.6 mg | 1,118.3 mg THC | 802.2 mg THC | 46.6 mg (PID) vs 33.4 mg (Oven) |
| 14.0 g (Half Ounce) | 22% THCA | 3,080 mg | 2,701.2 mg | 2,236.6 mg THC | 1,604.5 mg THC | 93.2 mg (PID) vs 66.9 mg (Oven) |
| 28.0 g (One Ounce) | 25% THCA | 7,000 mg | 6,139.0 mg | 5,083.1 mg THC | 3,646.6 mg THC | 211.8 mg (PID) vs 151.9 mg (Oven) |
Frequently Asked Engineering Questions
Below a water activity of 0.65 aW (65% equilibrium relative humidity inside a sealed curing vessel), unbound free water vapor pressure is insufficient for xerophilic molds such as Aspergillus flavus, Penicillium, or Botrytis cinerea to germinate or synthesize aflatoxins.
Because cannabinoid potency is measured as weight percentage on the submitted sample, over-drying a 9.6% THC batch from 11.5% moisture down to 6.0% moisture removes water mass and concentrates the dry-weight reading above 10.2% Total THC.
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