Prolixin open bottle dating

In particular, the information found within the Bottle Typing & Diagnostic Shapes complex of pages is of particular use.: If you are keying a bottle with a ground lip or finish, only questions #6 & #7 will help refine your dating quest since ground lip bottles and jars are rarely pontil marked (Question #4) and this finishing method is not covered under Question #5 (it falls out as "C" - Other Finishes - under Question #5).But when it comes to alcohol, where expiration dates are rarely available, how can we be sure our spirits are still sippable?While we know certain types of alcohol, like wine, can improve with age, what happens when a bottle has already been opened?If you are seeking information on what type bottle you have, go to the Bottle Typing & Diagnostic Shapes page which also will lead users to additional dating information.

and shows a gaffer (with the blowpipe) at work with his "mold tender" boy (seated).

There are several different type pontil marks, all of which are a mark or scar on the bottle base left by a type of pontil rod.

There is a lot variety possible within each category of pontil marks.

At least a few American glass companies were hand-blowing bottles into the mid-20th century (Toulouse 1971).

However, as noted in Jones & Sullivan (1989) "Hand-blown bottles lasted into the 1930s but only for small run types such as pharmaceutical bottles, cosmetic wares, and demijohns.

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