There are many ways to date old Ball mason jars, and one of the easiest is to look at the logo. Along with the logo, you can sometimes use the color, size, and other distinguishing marks to help date a mason jar.

Are blue mason jars safe?

Learn why you should retire old canning jars from their role of putting up food and treat them as antiques instead. Old canning jars are beautiful, but they are likely not safe to use in home canning.

Do blue mason jars contain lead?

Lead in colored or painted glass cookware Tamara also tested newer blue Ball mason jars and found some small levels of lead in them. However, she found that Ball is the most consistently lead-free glassware brand. Thus, it is best to use clear plain glass without any painted features, and I recommend the Ball brand.