The Collector's Ultimate Guide to Canning Jars
Kerr self-sealing jars and the Kerr Economy were created in Kerr also founded sealijg Hermetic Fruit Jar Company in the same year. San Francisco man Julius Landsberger patented metal lids fastened onto a composition gasket. Kerr used the patents to create a revelation in preserving food. Kerr, in jra, created a flat metal datin lid to fit onto a Mason jar to use with other canning jars. Inspect the jar from bottom to top. Look for the Kerr name, which is embossed onto the surface.
Observe the finish of maaon jar. If the base is smooth at the jar's lip, it was made by a machine after A rough base means the jar was made between and Look for mold seams. Jars not made by machines were free blown; no mold was used. A number is usually embossed on the jar's bottom, dubbed a "mold number. A mold seam means the jar is post datjng Look for small scars at the bottom and look to see if the is more modern.
This means it would be post, during days of more efficient machines. Look for a date of manufacture, dating kerr self sealing mason jar number, plant location and various other information. This would mean the jar is modern. Phillip Woolgar has been a reporter since in communities throughout western Canada. His work has appeared in Canadian national publications such as the "Globe and Mail" and the "Vancouver Sun.
Woolgar graduated from the Langara College Journalism Diploma program in How to Lerr Atlas Jars. What Do the Numbers Mean on the Vintage Ball Mason Jars? Collectors Guide to Mason Jars. How to Tell If a Mason Jar Is Antique. Copyright Leaf Group Ltd.