Never. I just dried it in a microwave before. But I can tell you that the traditional curing method found in all forums etc dries it too quickly, setting the green color. That's why it's green and remains green no matter what happens later. Here's some information about curing another plant called tobacco from this
article.
"Burley’s quality is influenced by moisture and temperature conditions inside the curing facility during the curing period. Steady or average daily humidity in the 72‐75% range is considered optimum for producing the quality of tobacco leaves currently desired by the industry. The optimum temperature is considered to be in a range of mean daily temperatures from 65 to 90˚F."
How many weed curing guides recommend that humidity level? None. Now here's what happens.
"Tobacco harvested in late September or early October presents additional challenges for curing. If the weather is especially dry during the first 3‐4 weeks, the tobacco may dry too fast, causing a greenish or “piebald” color to be set in the leaf."
It's supposed to dry over a period of weeks, not a few days like everyone does. After those first few days, when it gets down to 60-65% rh, it has already been dried. All that stuff with the jars is not curing, it's just further drying at a slower rate and then it's aging, which is different from curing. The humidity level of the weed after the 3 day drying is the same as the FINAL humidity of tobacco, 62%. That shows you that the weed is not cured at all, just quick dried, quick meaning about 3 days.
The way I now do it is a real curing method, flue curing. The way everybody else does it is not a curing method of any kind, it's a drying method. Show me one article on tobacco curing in which it's taken down to 62% humidity in 3 days at room temperature. The only humidity control done by everyone else is keeping it LOW, in the 60s, not up in the 70s. That's where you all screwed up and that's why you all have green weed.
Here's an example of how NOT to cure plant material, unless green is your favorite color. This is from
http://www.growweedeasy.com/drying-curing
"
Optimal Drying Environment:
Room Temperature - Around 70°F (21°C)
50% Humidity
Optimal Environment in Jars (Curing):
Room Temperature - Around 70°F (21°C)
60-65% Humidity"
What happened there was that the weed was quick dried in WAY too low humidity and then it was AGED in jars. Aging is not curing, which is why it's a different word. BTW, one way to maintain a RH of 72-75% would be to use a saturated solution of salt with excess salt grains, so basically a salt paste. If it gets dry you add water, if all the salt dissolves you add salt. I don't know how much it would take, probably a pan of it. Then you would keep that and the weed in a closed container with a small fan in it. Can't get much easier than that. You'd have to arrange the weed in such a way that air can circulate around it well, like maybe on a screen over the pan. I may try it sometime when I have some weed I don't mind sitting around for a couple months. Would it mold? I don't know, maybe or even probably. But then that's a good reason to flue cure it instead. No mold on my weed.