There might not be a written study but we’ve all tested and verified that getting as close to 6060 works better than anything else that we’ve tried so far, I have heard of some good product beeing produced in slightly higher temps and to be honest i usually can only get my temps to 64-66 epecially in the summer even with an AC. They do make machines that can handle the job such as cannatrol and i would be interested to try it but the costs extremely high, they also mention dew point rather than humidity level seemingly just to add confusion since its not rh but they do somewhat correlate however some different environmental factors can cause variations so dew point is a more accurate reading than rh or temp alone. In a typicalt scenario though the cannatrol suggested parameters are only slightly different from a 60/60 , which would have a dew point of 45 degrees The goal on cannatrol website is 53 degrees dew point with a 68 degree temp which typically translates to
You can set both the temperature and dew point on their machine (the dew point relates to relative humidity). But by using temperature and dew point, vapor pressure is also controlled and is a better standpoint to go off of since vpd can be adjusted as needed by adjusting temp and humidity slightly meaning if the temp is slightly lower you can still achieve the same results by adjusting humidity to the proper point of achieving same vpd as with the cannatrols 53 degree dew point parameter which may be hard to hit exactly but as long as you dont go above 70 degrees or below 63-65 you can adjust to the proper vpd by changing humidity. Just make sure you have some slight air flow as well in your dry room and you can achieve this without use of an expensive machine i just use a window fan or ac in the summer, then a small 6 inch hurricane fan and a $80 humidifier, links to those can be found in my amazon list on the light seeker links page.
In their user manual, Cannatrol recommends 4 days of drying at 68°F temperature and 53°F dew point. (68* 55% )* and for anyone wondering. They recommend a 4-day cure cycle at 68°F temperature and 52°F dew point, and then for storage, they go back to 68°F temperature and 53°F dew point. Which is the same as a VPD of .95-1 kpa. (68* 53* dew point ) or 1.1-1.15 kpa (68* 52* dew point) This is a little bit different from the 60/60 (.7 kpa) rule that many of you like to dry and cure at and what i did for years just fine. You can absolutely change the temperature and humidity on the Cannatrol to 60/60 if you’d like, or in your room I just figured it was relevant to mention their personal recommendations. And this does allow you to basically have a finished dry product than can instantly go to jars with very minimal burping. I have tried these parameters the last few harvests and they are now my preferred method. I basically put them in jars, burp once a day for a few days or if the jar gets over 60% then i let it sit and cure and usually only have to open the jar a couple times after this drying method since the room basically acted as a jar towards the end.
My girlfriend will love this cuz my room will be at its normal living condition. Basically all i will have to do is add a humidifier to my bedroom and adjust it to get the desired parameters, i woukdnt rely on the sensors on the humidifier though, i always use a second sensor closer to where the buds will be hanging to get a more accurate measurement. I usually find the humidifier has to be at a higher setting than i want the room to be in to maintain the actual humidity level i want.
What i find interesting is as the temp decreases, the humidity increases to maintain same dew point or vice versa, one thing to note is you wouldn’t want to really want to try this with a 60 degree temp as you would need 75% humidity and that would probably do more harm than goo
in this older video I got over best practices with the 60/60 method and although i no longger goo to 60/60 the snap and pinch test and many other tips are in that video, and a video containing a break down of thhe new method is just below this one.
Check this video for the more up to date method