Glass Discussion & Research. No ID requests here please. > Bohemia, Czechoslovakia, Czech Republic, Austria

Czech press moulded glass old and new???

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With due recognition of the views of certain members, with regard to commenting on live eBay auctions, I would however like to draw attention to auction number: 6565141456, for academic reasons.

What we see, is a large, frosted glass vase, press-moulded, with raised scenes of marine life. I have not held this, but the quality appears good, and the design is reminiscent of some Barolac designs. It might therefore be reasonable to assume this is a 1920's-30's piece.

Now compare that image with this one, a piece in my own collection;

It may not be absolutely obvious, but this image has been taken of the same section of decoration. What I can tell you is that the clear unfrosted vase has very clear mould lines. There is no doubt in my mind that these two vases came from the same mould.

The purpose of drawing these two vases to attention is to ask the question as to whether, the frosting of the glass reduces the prominence of the mould-lines?

If so, then the age of these vases may not be distinguishable, as naturally one might assume that the frosted one is early, the clear, late in the mould's life.

Given that I know the second to be of postcommunist Czech origin, it still carries its original LIBS "Glass from Bohemia" label (the former Libochovice glass-works, part of Sklo Union) is it possible to date the former? I can't tell you whether LIBS makes the same vase in frosted finish now.

Clearly, the return by so many Czech glass-works to resurrecting old designs, is bound to cause even the most expert, to have doubts.




Here's the vase I mentioned yesterday.  It's not the same...but feels similar.   The mould marks are very distinct and it has a lovely satin finish, with flower mouldings that are proud of the surface:

 :D  I'm not sure if this is any use to you...but it was worth a try!   :D

Perhaps the frosted one was just finished off to a higher standard - either earlier or later, with the mould marks removed?
I'm not normally a fan of frosted glass, but I prefer the frosted one, and I think it's lovely! (maybe it's just that I like the marine scene!)

I can see that any extra treatment or finishing that would involve re-heating could certainly reduce the prominence of mould lines - as it could effectively "fire polish" them. But my understanding of frosting is that it wouldn't involve re-heating.

As I understand it, the prominence of mould lines is more likely to be caused by the mould sections not fitting as tightly as they might. Thus a tiny seepage could be squeezed out between the sections/joints of the mould during pressing. This would (as I understand it) give a more prominent mould line. This can be taken to greater extremes where small "fins" of glass may actually seep out.

Thanks to all of you for your input.

I flagged this up, because of the obvious link to a vase I have, but also because back-catalogue production and marketing, mean most folks will not have any idea as to how to determine new from old. Certainly Seigmar, and others, have raised serious questions about re-introduction of back-catalogue production on for some time now.




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