❯ ❯ ❯ Link: Dating glass bottles
♥♥♥ Visit site: https://dirty-tinder.com
He also explains the history and methods of early bottle production, and how diggers find bottles. Do the mold seams disappear in the neck, but the bottle lacks a pontil mark. Having written extensively on North American archaeology and material culture, he has contributed to various archaeological journals and publications. Asymmetry is an indication of a hand-blown bottle. If the seams disappear in the neck, the bottle was probably "blown-in-mold" and dates circa 1820 to early 1900s. Loaded with detailed descriptions and diagrams, and luscious high res photos, this is a superlative one-stop educational resource and vicarious digger experience. Is the lettering applied and in color. Is a pontil mark present along with disappearing side mold seams. This type of bottle was probably dip-molded and dates after circa 1820. The scar was left when the pontil was detached from the bottle. Blown-in-mold bottles dating glass bottles pontil marks date circa 1860s to 1910s. Dating Bottles by Color Is the bottle machine made and aqua- or light green in color. Is the base indented with an irregular to round pontil scar. This bottle probably dates circa 1820 to 1860. Is embossed lettering present. These bottles date after 1940. Both require more specific research to refine the bottle's date beyond observation of technology. Also keep in mind that bottles could have been used and refilled multiple times. Bottles with a purplish or amethyst hue are made from manganese dioxide glass and date circa 1880 to 1920. This is another indication of a machine-made bottle. Look for a "suction" scar dating glass bottles the base. Bottles with suction scars were made in an Owens Automatic Bottle Machine and date after 1903.
These bottles date after 1940. Is the base indented with an irregular to round pontil scar? Glas pontil rod held the nearly molten bottle during the final stages of manufacture.
Dating antique bottles requires knowledge of the evolution of bottle technology and the ability to research manufacturers and bottling companies.
dating, glass, bottles