patandchickens
Crazy Cat Lady
That's really odd, WZ, have you asked for it by other names (acetic acid, which is what it is chemically; or by brandnames such as Burnout etc?)
http://forums.egullet.org/index.php?/topic/132057-reducing-vinegar/ contains a lengthy exchange about trying to concentrate vinegar for cooking purposes, and seems to conclude that you cannot concentrate it very well by boiling on account of it having pretty near the same boiling point as water.
Most home gardeners are not going to want to get into distillation, leaving freezing as a possibility I suppose but I do NOT know whether it works (dunno what the freezing point of vinegar is, but some things can be concentrated by freezing and then you remove the ice when it is mostly-frozen and what remains is concentrated stuff-with-lower-freezing-point or water-with-more-solutes-in-it)
Honestly, though: boiling water.
Pat
http://forums.egullet.org/index.php?/topic/132057-reducing-vinegar/ contains a lengthy exchange about trying to concentrate vinegar for cooking purposes, and seems to conclude that you cannot concentrate it very well by boiling on account of it having pretty near the same boiling point as water.
Most home gardeners are not going to want to get into distillation, leaving freezing as a possibility I suppose but I do NOT know whether it works (dunno what the freezing point of vinegar is, but some things can be concentrated by freezing and then you remove the ice when it is mostly-frozen and what remains is concentrated stuff-with-lower-freezing-point or water-with-more-solutes-in-it)
Honestly, though: boiling water.
Pat