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. Therefore, these issues 
need-not be looked at under control. The question numbers on this page continue where they left off on the mouth-blown bottle portion of the key.
Concern #8 : ‘s the package glass color aqua (aquamarine otherwise really light green), essentially colorless (clear), otherwise a color except that colorless or aqua?
Question #10 : Really does the new package feel the following the statement embossed to your the top otherwise on base? Federal Legislation Prohibits Marketing Or Recycle Regarding the Container
Concern #eleven : Really does the newest container legs features equivalent scars to people on the bottles pictured? (These types of markings are the ones of your Owens-Illinois Glass Business.)
Machine-generated bottle that have colorless glass normally time from anytime immediately following 1905, although there is a fairly legitimate matchmaking split you are able to predicated on the type of colorless mug
Matter #a dozen : Do this new container provides a conclusion (lip) which was closed having a cork, shut with an externally threaded shag limit, or closed with various sorts of closing?
Question #fourteen : Really does the fresh new container possess good shallowly incised circle with the ft that’s (usually) ranging from 1/3″ to 3/4″ (10-18mm) within the diameter?
Question #17 : Really does most of the otherwise the main package legs provides a textured pattern, i.elizabeth., stippling or knurling?
Sort through all the concerns to determine what keeps pertinence into bottle you need to date. Track the diagnostic feature time range listed in for each matter your consult, and when with the avoid of your web page, use you to definitely recommendations to determine the probably development go out a number of the bottles.
As with throat-blown bottle, so much more direct matchmaking regarding a host-produced bottle can be done with many confidence by using you to or more of the numerous symptomatic keeps detail by detail on the concerns in this post
Since the informed me previously a lot more than, be aware that the 1905 “earliest” go out used in all the questions isn’t absolute. There had been specific large throat, semi-automated servers produced container (albeit an incredibly reasonable commission) which had server-generated properties (without a suction mark) than just can go back as early as this new middle-1890s.
A great. Package produced from aqua mug – 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.
Just click Groves Chill Tonic to access a picture of a keen aqua therapeutic throughout the 1910-1920 time. (The newest package pictured concerned #9 below with a plethora of bubbles on the cup create meet the requirements a particular strong colour of aqua.) The level of aqua glass package lead declines during this era to make certain that of the mid so you can later 1920s this new principal color to possess machine-made container (excluding soda bottles and you can canning containers) is actually colorless or amber. Aqua literally vanishes because of the early 1930s because the a container color toward notable different regarding soft drink package (and many canning containers) and that stayed made in individuals styles away from aqua up until the last few years (Miller & McNichol 2002,2010; empirical observations). Regal Top Cola, Dr. Pepper (one another good greenish aqua), and you can Coca-Soda (“Georgia Environmentally friendly”) try familiar samples of later era aqua bottle (Toulouse 1971). For more information on this colour, simply click aqua to consult with the breakdown on Package Shade web page.
B. Package try away from mostly 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.
