Topic: Interesting pressed cased ashtray. Czech?

[Lustrousstone]

Today was a good day. Picked this up at a flea market. It has a thick clear outer with a pressed lighthouse lens type pattern, a thin green inner layer with a vertical rib pressed pattern, hand shaped cigarette rests and a ground unpolished base with chamfered edges. The glass is 1.25 cm thick. My thought was Czech

[krsilber]

Interesting is right!  I always thought pressed things couldn't be cased. Very intriguing.

[Lustrousstone]

It's definitely got a thin green inner layer, although it isn't very even, that looks as though it was there before the inner plunger.

[Cathy B]

could it be mould-blown?

[krsilber]

I reckon Cathy's right.  Cased, mold blown for the outer pattern, cracked off, and a different kind of mold used for the inner pattern.  What would you call a mold like that, one that creates an interior pattern?  Very uncommon in American glass, I b'lieve.  What about in European glass?

Nifty piece!

[Lustrousstone]

It's a three part outer mould... some Czech pressed production was cased I believe. The inner layer is very thin but thicker than a stain. A cone-shaped plunger with a flattened end would work

[krsilber]

It would not have worked to create the two layers in one pressed molding process, even if the plunger were patterned.  The molten glass is poured in the mold, and the plunger pressed down.  There's no way to get multiple layers.

A blow mold can have seams, if that's the reason you think it's pressed.  Or perhaps the outer bit was pressed, then it was cased inside by blowing, then patterned inside?  I once ran across an old patent for flashing pressed glass, but that's the only time I ever heard of anything close to pressed and cased.

[Frank]

I think you will find other examples here. It is possible but I don't know the methods.

[krsilber]

According to Adam D. in this thread http://www.glassmessages.com/index.php/topic,981.0.html

"1.  You can't "mould" anything, pressed or blown, and then case it,

2.  You can't press cased glass." 

He went on to qualify what he meant in (1),

"When anyone talks about "moulding" (a term I avoid myself) I always assume they are talking about pressing or blowing into a mould.  To me that means that the article is then finished and cold (or at least in the lehr) so that casing afterwards must be out of the question.

Obviously, marvering, dipping into a former or any of the blower's many tricks while the glass is soft does not preclude casing, indeed might be essential."

I hope a glassmaker or two sees this thread.  It's got me curious now!!  I did a search for "pressed cased," both Google and the board, but didn't come up with anything pertinent besides the above.

[Lustrousstone]

I think the question is not whether it was pressed or not but how the green was applied. I am confident it is pressed not blown, mould or otherwise. Maybe it is flashed. It certainly has had two hand finishing techniques applied post pressing. I suspect early post WW2 Czech production when automation was still in its early stages