With a few new words under my belt (thanks, Paul!), would you all bear with me when I try to describe what happens in this video?
https://www.youtube.com/watch?v=oNeIadsTjQ8 (making a juice glass, shows all steps, ca 3 min)
I know that all of you know what is going on, but if I was to describe the steps to someone less savvy... of course I might say/write "blob" but it would be nice to be able to add "which is called a parison" and so on.
All question marks are there because I want to make sure they are correct, or to be corrected. Please, all corrections welcome! (since I became aware of the Swedish words, I have only met one English-speaking glass blower... and she had work to do while I was asking, so I tried to restrain myself)
Description of the steps in the video “Making a juice glass”
The man (assistant) is gathering (“making a gather”?) glass from the pot in the furnace.
Then he is cooling the blowpipe with a spray of water.
Next comes marvering, the rolling of the blob (“parison”?) on a warm metal plate.
(we are not shown the first small blowing, very little air that then is stopped by his thumb and let go down into the blob (“parison”?) to make a little bubble – in one dictionary I find “making a gathering bubble”)
He is then using a wet blocking wood to make it nice and round, and blows some more.
At 0:53 seconds we see the mould closing on the parison, we see the parison turn in the mould (we don’t see the guy blowing, but I assure you: he is standing above the mould blowing into the blowpipe “until done”) and at 1:09 we see the mould opening. (The closing/opening and then wetting of the mould is maneuvered by the guy blowing, with his feet on one or another switch)
(They are using a closed mould, because this glass is to be made ready in the hot shop – had it been for later cracking the mould would have had a bigger hole at the top – then there had been a “moil cap”, according to one dictionary…)
After his using of the pucelas, he then uses the (wet) pallet to make the bottom flat.
Then the gaffer comes with a pontil (assuming the gaffer is the most skilled man of the chair/”team”) , places the pontil and the glass is broken free.
After re-heating in the glory hole, the gaffer opens (“flares”?) the mouth of the (is it still a parison, here, and is he still using a pucelas?) and waits for the assistant to come with the blue glass to put around the very top.
After another re-heating he uses another kind of tool (or is that too a pucelas?) to “flare” and give the final shape to the glass, which is then broken free from the pontil.
The pontil scar is then fire-polished, and the complete glass is taken to the annealing … cupboard (?).
This glassworks is too small to use the lehr unless they are making very big items.
Thank you for reading this far, and thank you in advance for all the comments I hope for!
(Paul, you wrote "Quite wrongly I'd assumed that the subject matter was more of 'put a gather into a mould, squeeze together, pull plunger, and a vase comes out the other end' - sort of thing, but obviously that's not the case. Seams can be avoided if the glass is 'turned', but where the gob isn't attached to a rod, and instead is pressed with a plunger, then the glass is static and seams do result."
This is a different process, called pressing. By reading several threads in the archives of this forum, I learned a lot bot about pressing procedures and the words that go with them.
But they do not necessarily apply to blowing, whether "off-hand" or using moulds)
Topic: Need help with terminology on diverse ”moulding” (Read 1696 times)
