Bottle & Glass Makers Marks - This section is only introduced on this page, the bulk of the information being located on a separate webpage. C.), various simple hand tools, and usually a hollowed out block and a flat table called a marver (Hunter 1950).This page briefly the complex subject of the makers marks that bottle producers often placed on bottles for various reasons. Free-blown utilitarian bottles found or made in the U. typically date from or before the American Civil War (early 1860s and prior) and can be, of course, much older than that.One additional subject is also briefly covered via this webpage: bottle/glass makers markings.The subject of bottle/glass makers is important because the embossed markings that bottle makers placed on their wares, if present, are often excellent tools to assist a person in narrowing down a date range that a particular bottle was most likely produced, when used along with the manufacturing based diagnostic features. Bottle & Glass Makers Marks at the bottom of this page, though most of the information is found - This section addresses the manual processes for making bottles, used prior to automation of the industry, where the bottle was blown/expanded with the power of human lungs; thus the term "mouth-blown." Introduction Bottle Molds - Dip molds - Pattern molds - Half-post method - Keyed & hinge molds - Post-bottom molds - Cup-bottom molds - Three-piece molds - Three part molds with three body-mold leaves - Four-part molds - Turn molds - Plates & plate molds - Mold air venting Finishing - Cracking-off, burst-off & shearing - Fire polished finish - Ground rim/lip or finish - Laid-on ring - Rolled or folded in/out finish - Flared or flanged finish - Applied finishes - Tooled finishes C. Free-blown bottles were produced without the aid of a containment mold being instead formed and shaped by the skills of the glassblower using manipulation of the blowpipe (the use of which dates back to the 3rd century B.Before 1840 (and to a large degree before 1870) and after 1920, the lines would be relatively flat and very low on the "change" axis.The point here is that bottles made before the mid-19th century and those made after about 1920 share very similar manufacturing induced physical features with other bottles within those respective age groups (Scoville 1948; Mc Kearin & Wilson 1978; Van den Bossche 2001).Your browser includes functionality to increase or decrease the text on a web page.
(Authors note: The late 19th century European trade card below shows glassworkers making gathers via the bocca - or opening - in the glass furnace.) The gatherer then passes the blowpipe with the gather (hot glass on the tip of the blowpipe), sometimes called the post, to the servitor, who is the master blower's first assistant; the servitor then rolls the gather on a marble or metal slab called a marver.
Up until the mid-19th century, bottle and glass making followed virtually the same craft-based processes that had been used for many centuries.
Bottles made in the 1630s (or even the 1030s for that matter) were made in an virtually identical fashion to many bottles made in the 1830s, with some stylistic shape differences of course. The actual production date range for these bottles was 1780 to the 1820s (Scoville 1948; Mc Kearin & Wilson 1978; Cable 1999; Griffenhagen & Bogard 1999; Van den Bossche 2001). crown finish, micro-brew beer bottle produced today shares virtually the same manufacturing induced physical features- including the location of mold seams - as a beer bottle produced by an early machine in 1918.
Users may also check the Website Map page which has a listing - and links to - every page within the Historic Bottle Website.
Additional specifics about dating bottles via the manufacturing based features noted below are found within the assortment other "specialty" pages (e.g., Bottle Bases, Finishes, etc.) shown on the Website Map.
This begins with the era of mouth-blown bottles - a process depicted in the late 19th-century trade card pictured above - through the conquest of the bottle manufacturing world by fully automatic bottle making machines during the first few decades of the 20th century. Instead, it attempts to cover the basic bottle making processes that are pertinent to the goals of this website as stated on the Homepage, with some anecdotes and related information here and there for interest and illumination.