How to cut glass with a string


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I always thought that the only way to cleanly cut a piece of glass was with a glass cutter, but by looking at the following clip, it seems that you can also do with with a piece of string and a little acetone. Is this another one of those fake “how to” videos? Just be careful if you try, playing with acetone and fire could be dangerous.





14 Responses to How to cut glass with a string

  1. The idea is sound. You apply a narrow ridge of heat to the glass and then cool it quickly. The glass then breaks at the point where the temperature change is the greatest. It’s like putting an empty glass coffee pot on the burner and having it crack. Only in this case, it’s controlled.

    I’d be afraid the bottle might explode into little glassy bits. If it did you would definitely get hurt.

  2. The idea is sound. You apply a narrow ridge of heat to the glass and then cool it quickly. The glass then breaks at the point where the temperature change is the greatest. It's like putting an empty glass coffee pot on the burner and having it crack. Only in this case, it's controlled.

    I'd be afraid the bottle might explode into little glassy bits. If it did you would definitely get hurt.

  3. the only thing that could in principle cause this sort of “cutting” would be rapid cooling of the glass causing a controlled break. The thing is, there needs to be quite a bit of heat transferred to the glass for it to work. that being said, I really doubt that this would work in a reasonable amount of time.

  4. the only thing that could in principle cause this sort of "cutting" would be rapid cooling of the glass causing a controlled break. The thing is, there needs to be quite a bit of heat transferred to the glass for it to work. that being said, I really doubt that this would work in a reasonable amount of time.

  5. You have to be stupid to even imagine this is a ‘fake how to’.

    Honestly.

    How uneducated are most people?

  6. You have to be stupid to even imagine this is a 'fake how to'.

    Honestly.

    How uneducated are most people?

  7. heat rises, as it does it rapidly cools the glass, that's why he kept spinning it, to keep that one narrow band colder than the rest of the glass, then the water which is either hot or room temp, either way it will be warmer than that narrow band of glass the sudden change in the temperature makes the glass brittle and it breaks