Peter, I also was writing about the pressed & blown process. I have read (and indeed I did re-read) what Adam wrote and as far as I am aware, with my own limited comprehension, I was referring to the same process.
My understanding is that the Inca vase (and its brothers and sisters, and items such as the water pitcher I linked to) were made using a pressed & blown process. All the items I have mentioned above had mould lines. The moulds would have been jointed and would have needed to be opened up to allow the item to be removed. The Inca (and family) have a very distinctive series of mould lines, both horizontally and vertically. The neck of the vase has two vertical mould lines running top to bottom, and a third, horizontally, just below the rim of the neck. The very distinctive cross section of the Inca (the Pebble & Fan, the Giant Lily and the Seagulls vase) is most unusual and I have not seen another vase exactly like them (so far.....and in my experience only).
The other point that I was trying to explain (obviously badly) was that (according to my limited and no doubt "challenged" understanding) the two characteristics:
1 being formed (ie moulded)
2 being fire polished or ground
are not mutually exclusive. In other words, an item can be moulded and also be ground or polished or fire polished.
The reason I said that was because of your comment
To clarify, I guess the only similarity is the fact that it is formed rather than cracked/ground/polished/ fire polished.
My apologies if that is not what you meant - but that is what I thought you were saying.
Perhaps our discussion is all down to semantics and my not quite understanding what exactly you are saying. Possibly it's all down to the fact that I am probably two sandwiches short of a full picnic.
Re. the Oberglas website, I was simply saying that the url link you mentioned (for which - thank you) was not one I had seen when I did my original searching last year - quite possibly it is new. I was trying to explain that I couldn't see anything on the website you kindly gave (nor on the one I had mentioned) that would help us to answer the current ID question. I noted that I had emailed the directors etc last year (several times) and no reply had been forthcoming.
Glen (aka Geln)
Apologies if this seems a bit like a soliloquy, but I just wanted to explain what I mean by blow moulding, with particular reference to the bulbous vases and pitchers that I mentioned. If the shape of the article is such that a plunger cannot be used (eg in the case of a vase, it is smaller at its top/mouth than lower down, thus a plunger could not be removed) then the method used to shape the glass to the inside of the mould is to force it against the sides using air pressure, i.e. to blow it in - thus the term â€śblow mouldingâ€ť. The pressure of the blown air would then push the glass against the inside of the mould and leave the centre of the vase hollow.
I quote below from Fenton Art Glass website regarding press and blow moulding:
Highly skilled workers called gatherers wind hot molten glass on a hollow blowpipe or the tip of a long steel rod called a punty. After judging the proper amount, the gatherer must shape the gob of glass properly and drop it precisely in the center of the mould.
The presser's function is to ensure that the glass takes the proper form of the mould. Too much pressure, and the glass will shatter; too little pressure and the mould will not fill properly.
For some pieces, the molten glass is blown into a mould to form the basic shape and pattern. Finishers use what is known as pucellas or "tool" and a cherry wood paddle to finalize the form, flaring, crimping and/or straightening the glass. This requires a well-honed sense of timing because all these actions must be completed before the glass cools into its solid form.
And if you look at this website (also Fenton) http://www.fentonartglass.com/fenton_skf.htm
and scroll down to the photo of a blue Favrene vase (with a bulbous middle) you will read this - the photo of the vase will also help to underline what Iâ€™m trying to say.
Each piece is handcrafted, carefully hand-blown into a mould that imparts the â€śLoganberryâ€ť design