Pulled white vinegar containers from the overall testing since the filaments were beginning to exhibit mold specks, and due to the odor. Other containers appear to be unchanged from last reporting.
No sign of discoloration. Humidity still reading at 99% RH.
75 hours after initiating the test, the hygrometer continues to read 99%. There is no sign of discoloration yet. The smell of white vinegar is very strong - and it's likely no one will want this as an option. I'll leave the two vinegar containers for now.
I opened the cooler and inserted a hygrometer. A slight odor of the white vinegar was noticeable. About an hour later the relative humidity is around 92%. This is likely the result of 7 filaments being in use at the same time, the cooler volume being smaller and its seal being better than in a Musik Tent enclosure. This elevated humidity should accelerate the testing. Checked a few hours later and hygrometer was up to 97% RH. Later in day, the inside of the cooler has climbed to 99% RH.
In order to test various mold and mildew inhibitors, we filled up 7 containers with 1.5 cups of water each as follows:
A Taylor 814ce #guitar posted on a major resell site has stress cracks all over, likely from humidity related damage. They're asking about half as much as other similar postings. Don’t let this happen to your guitars. Musik Tent Instrument Humidors. http://origineer.com #acousticguitar
Made it 200 days without refilling the Musik Tent reservoir, while still maintaining very controlled humidity in a guitar sound hole.
How can the ambient humidity be so low when it's so humid outside? Humidity depends on temperature, which is why it's referred to as relative humidity. It's essentially the moisture content of the air relative to the temperature. Even if it's 90% RH outside, the humidity inside may be much lower due to air conditioning. Generally, the cooler the room, the lower the humidity. We tend to maintain around 74 to 75 deg F, so you'll see that the ambient (room) humidity hasn't exceeded 45% yet.
Removed my 414CE today, after months inside the Musik Tent, and was pleasantly surprised it was still in nearly perfect tune.
Damon DeBusk is a multi-patented product designer, process and quality engineer, project manager, author, and inventor of Musik Tent Instrument Humidors and HumiForm Cigar Humidifiers.