Reminds me of the pitch drop experiments.Alan Carruth wrote:If it's thick enough so that you don't notice the flow under normal circumstances, it's a 'solid' for most purposes, but not all.
if that's true it should be repeatable, and sounds like a heck of a science project for the kiddos. can anyone tell me how to achieve room temperature glass fusing without chemicals?Alan Carruth wrote:You have to keep in mind the role of chemistry in all of this. Glass that has been exposed to water vapor picks it up in a hurry, and changes chemically into something that won't coalesce. In the case of my watch the crack was too small, so the surface was not contaminated and it was able to heal itself. I'm sure this is rare; I've never heard of it otherwise, but I can assure you it happened, and that's the only explanation that makes any sense.
In any thermoplastic they talk about the 'glass point'; the temperature above which it can flow more or less freely. However, most, if not all, thermoplastics will cold creep at almost any temperature, and that's a function of flow. The distinction between an 'amorphous solid' and a 'thick/cold liquid' is almost a semantic point in some respects. If it's thick enough so that you don't notice the flow under normal circumstances, it's a 'solid' for most purposes, but not all.
Interesting tale, any particular study or reason for this? Is it to do with the amount you play or how you play? I'm now worried that my guitars would all retract and play less well than when I got it.... I'm the student you see.....cedartop wrote: ↑Mon Dec 12, 2016 6:11 pmAccording to my guitar maker, if I may paraphrase, spruce grain is more "thatched" and cedar is more "straight," so cedar opens up faster. He also notes that the guitar's sound characteristics and the nature of the sound doesn't really change, it just becomes easier to get it out. In other words, a guitar isn't going to become a different guitar. A poor instrument will not get better just because it is played a lot. The quality of the player also figures into the equation. My maker once made two guitars as closely to the same as possible. The woods were all from the same trees, everything was measured and weighed, etc. One went to a teacher and one to his student. He got them to agree to switch guitars after 6 months. At the time of the switch, the teacher's guitar was much more "open" than the student's. After they switched, the guitar that had beenthe student's opened up more and the guitar that had been the teacher's retracted.
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