Copy pasted dating

Other diagnostic tools must be used to date these items.

Shape is more indicative of function - i.e., what the bottle was used for or contained - but even that has a myriad of exceptions.

In short, there was (and is) nothing to stop a glassmaker from using an obsolete method in the production of a bottle.3.

Some technological changes were expensive and not adopted by glass makers until it became an "adapt or perish" issue and many glass factories just perished.

An example of this is the finding of a few pontil scarred utilitarian bottles among otherwise late 19th or early 20th century refuse.

It is unlikely that this bottle was made during the same era, but instead was reused for a lengthy period or otherwise retained until broken or discarded.

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But any technique, once developed, can be used right up to the present - as many collectors know who have been so unfortunate as to rely too heavily on a popular termination date as sure evidence of true antiquity..." (Toulouse 1969b).See the Bottle Typing/Diagnostic Shapes page for more information on the subject..And last, but definitely not least, is the fact that the art and science of glassmaking had a lot of glassmaker/glassblower induced uniqueness in the form of variations, errors, experimentations, and retrogressions.In order to continue using your account, you have to agree to the Terms of Use and Privacy Policy.You must agree to the changes in order to access your account, and all the work associated with it.If you do not agree to these changes, you will be logged out and your account will be deactivated.

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