You can re-melt it as many times as you want, but you probably can't print with sufficient accuracy to create a new roll of filament. And it would take several

You can re-melt it as many times as you want, but you probably can't print with sufficient accuracy to create a new roll of filament. And it would take several days of printing to get through a whole roll of filament. And besides, if you already had a 3D printer that could print with the filament you have, you could just print things with that filament instead of printing filament that isn't compatible with your printer :p Here's a project to make a machine that produces filament for printing, but it's at about the stage hobbyist 3D printers were at ~10 years ago or more, in terms of reliability and ease of use: http://www.instructables.com/id/Build-your-own-3d-printing-filament-factory-Filame/ http://www.instructables.com/id/Build-your-own-3d-printing-f...