Unlike the first portions of the Dating key (Questions #1 through #3 on the main Bottle Dating page; #4 through #7 on the Mouth-blown bottles portion of the dating key), each question on this page is an independent dating tool for which the response is perhaps not predicated on the outcome of any of the other questions. Ergo, these types of concerns needn’t be viewed under control. The question numbers on this page continue where they left off on the mouth-blown bottle portion of the key.

Question #8 : ‘s the container glass colour aqua (aquamarine otherwise most light green), essentially colorless (clear), or a colors aside from colorless or aqua?

Concern #ten : Does the bottles feel the adopting the statement embossed into its top or with the ft? Federal Rules Prohibits Profit Or Reuse Of Container

Question #11 : Does the newest package feet possess comparable scars to the people into package pictured? (These markings are those of the Owens-Illinois Mug Company.)

Machine-made container having colorless glass normally go out off at any time once 1905, though there is actually a fairly credible matchmaking crack you can considering the type of colorless glass

Concern #several : Really does the latest package has actually a finish (lip) which was sealed having good cork, closed which have an externally threaded screw limit, otherwise shut with some other type closing?

Question #14 : Does brand new bottle possess good shallowly incised community on the ft that is (usually) anywhere between 1/3″ to three/4″ (10-18mm) within the diameter?

Concern #17 : Do the otherwise area of the container legs enjoys a beneficial distinctive development, i.e., stippling or knurling?

Sort through all the issues to see which has actually pertinence to your container you need to time. Monitor the particular symptomatic function time selections listed in for each matter your demand, as soon as towards the avoid of your webpage, fool around with you to definitely pointers to determine the most likely design time set of your own bottles.

As with throat-blown bottles, significantly more right relationships from a host-made package you certainly can do which includes confidence by using one or higher of the various diagnostic possess intricate from the questions on this page

Since explained in the past above, be aware that this new 1905 “earliest” date found in all the questions isn’t sheer. There have been particular wide throat, semi-automated servers produced package (albeit an extremely lower commission) which in fact had server-generated services (without a suction scar) than simply can be go back as soon as the newest mid-1890s.

A. Bottles made from aqua glass – A machine-made bottle made of aqua glass – which is not a soda bottle or canning jar – is most likely to date from or prior to the 1920s.

Click on Groves Cool Tonic to access a picture of an aqua therapeutic regarding 1910-1920 era. (The latest container pictured concerned #9 less than which have a plethora of bubbles regarding the mug do be considered a specific deep color of aqua.) The level of aqua glass package introduced refuses during the this era so by the middle to help you late 1920s new dominating shade to have machine-made bottle (leaving out soft drink bottles and canning containers) was colorless otherwise amber. Aqua nearly vanishes of the early 1930s because the a bottle color on prominent exception from soft drink container (and some canning containers) which always been manufactured in certain tones out-of aqua right up up to modern times (Miller & McNichol 2002,2010; empirical observations). Regal Top Cola, Dr. Pepper (each escort girl Corona other a beneficial greenish aqua), and Coca-Cola (“Georgia Green”) was common types of late era aqua container (Toulouse 1971). More resources for this colour, simply click aqua to consult with their dysfunction toward Bottles Tone web page.

B. Bottles is from largely colorless (aka “clear”) cup In the production of colorless glass numerous methods – mechanical, physical, and/or chemical – were used to decolorize glass (Tooley 1953). Decolorizing is in essence neutralizing the effects of the iron and carbonaceous impurities in the glass mix in order to obtain as colorless of glass as possible. The primary physical (masking) agents used in the first half of the 20th century were manganese dioxide, selenium, and arsenic. All potentially leave a very slight residual color to the glass that is usually visible when looking closely at the thickest portion of the base or sides. For more information click colorless glass to go to that section of the Bottle Colors page.