How do you make a bologna bottle?

[tribdog]

A bologna bottle is a glass bottle that is hard enough to pound nails with, but if the inside is scratched the bottle shatters.
I know that the bottle is made by cooling the outside slowly and the inside quickly, but is this something anyone can do? how slowly does the outside have to cool and how quickly for the inside? can a coke bottle be turned into a bologna bottle?

 

[chemisttree]

Have you looked here:

http://forums.spookclub.com/viewtop...start=15&sid=e451d943a8993e08b0289dd3bf9dfa9b

Or here:



I would recommend not using your carpet to cool off the coke bottle. Remember what happened last time...

 

[jordan101]

Firstly this is my first post here so i'd just like to say a big hello to everyone here...Hello! I have been looking for the answer to this question all over the net and found nothing. can anyone help?

Thanks