cobaltbot
Well-Known Member
There's been a lot of previous threads about glass being in flux and not really a solid or a liquid. I've had too many bottles develop cracks after overnight or a few days later that appeared mint when first cleaned. Also, like Chris said some defects don't show up until the bottle dries for a while. A lot of the time this has been my own fault for not letting them sit or soak before washing them up, putting too much stress in the necks when cleaning, exposing them to the sun, etc. Not just temperature is at play here but think for over a hundred years that bottle had been held suspended in the ground under force. Changes in humidity, temperature and pressure are very gradual until being plucked from the earth, wall cavity or whatever. Add up all these dramatic changes, including solar exposure and trouble can happen.