How do glass companies know how to mold an hourglass to have the sand fall precisely?
In: Technology
Bonus question with answer:
Q: How do thermometer manufacturers know how to blow glass so that the alcohol or mercury expands perfectly to tell you the temperature.
A: They don’t. They get it close, then put the thermometer in fluids at a two different known temperatures then mark the glass. Then they pick the correct pre-made stencil to fit those two markings and paint the rest.
(More or less)
Latest Answers