Has anyone ever seen this on a Ball canning jar?
It’s on the inside of a fresh one. It’s not on the lid or ring. Almost behaves like ink with just a bit of water.
#Canning #Gardening #Recipes #Cooking
Discussion
My guess is it's residue from the anti-abrasion coating they spray on glass bottles and jars when they're manufactured to keep them from getting scratched in handling. I don't know if Ball uses that process, but lots of glass container manufacturers do. It should wash off with soap and water, and it's a good reminder to always wash new jars well before using them.