Yes, glass can be melted down and re-blown in a similar way to metal. The process of melting glass to a molten state and then shaping it by blowing air into it is called glassblowing. Glassblowing has been practiced for centuries and is a common method for creating various glass objects and artworks.
To re-blow glass, the glassblower typically starts with small pieces of glass, such as broken or scrap glass, which are heated in a furnace until they reach a molten state. The molten glass is then gathered on the end of a blowpipe, which is a long, hollow metal tube. The glassblower blows air into the blowpipe, creating a bubble in the molten glass. By manipulating the blowpipe and using various tools, the glassblower can shape and mold the glass as desired.
Glassblowing requires skill and experience, as the glass needs to be heated and cooled properly to prevent cracking or other defects. The process can be used to create a wide range of glass objects, from simple glassware like cups and vases to intricate sculptures and artistic pieces.
It's worth noting that not all types of glass can be easily melted and re-blown. Some glasses have specific compositions or properties that make them less suitable for glassblowing. However, many types of common glass, such as soda-lime glass, can be successfully melted down and re-blown.