Wouldn't the hot glass stick to the inside of the mold?

the glass is both flexable and not too stiky. So, it is like a rubber

At 0:50, it looks like the glass is liquid. A molten hot liquid. Why is it not dripping or flowing?

What you saw is indeed liquid but it's too viscous to drip. I am sure other things affect it too like surface tension.

How hot does glass need to be to be "blown"?

It depends. Usually around 700-800 degrees if you need a kiln, I think

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Course: The J. Paul Getty Museum > Unit 2

Lesson 1: Ancient glassmaking

Glassmaking technique: mold-blown glass

Name: Glassmaking technique: mold-blown glass
Uploaded: 2013-10-28T17:45:57Z
Description: Mold-blown glass is made by blowing hot glass into a mold made of clay, wood, or metal. Watch a glassmaker use a mold with incised designs (footage from the Corning Museum of Glass).

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Mold-blown glass is made by blowing hot glass into a mold made of clay, wood, or metal. Watch a glassmaker use a mold with incised designs (footage from the Corning Museum of Glass). Created by Getty Museum.

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MᴇɢᴀMᴇɢ
Posted 10 years ago. Direct link to MᴇɢᴀMᴇɢ's post “Wouldn't the hot glass st...”
Wouldn't the hot glass stick to the inside of the mold?
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(13 votes)
Answer
- first0841
  Posted 10 years ago. Direct link to first0841's post “the glass is both flexabl...”
  the glass is both flexable and not too stiky. So, it is like a rubber
  Comment on first0841's post “the glass is both flexabl...”
  (5 votes)
Alex Gruenenfelder
Posted 10 years ago. Direct link to Alex Gruenenfelder's post “At 0:50, it looks like th...”
At
0:50
, it looks like the glass is liquid. A molten hot liquid. Why is it not dripping or flowing?
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(4 votes)
Answer
- kkovacsb
  Posted 10 years ago. Direct link to kkovacsb's post “What you saw is indeed li...”
  What you saw is indeed liquid but it's too viscous to drip. I am sure other things affect it too like surface tension.
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  (4 votes)
Tony Salls
Posted 10 years ago. Direct link to Tony Salls's post “How hot does glass need t...”
How hot does glass need to be to be "blown"?
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(2 votes)
Answer
- Andrew
  Posted 10 years ago. Direct link to Andrew's post “It depends. Usually aroun...”
  It depends. Usually around 700-800 degrees if you need a kiln, I think
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  (2 votes)
marge
Posted 9 years ago. Direct link to marge 's post “If how hot is the glass? ...”
If how hot is the glass? If it is put in a wood mold wouldn't it burn the mold or at least make scorch marks?
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(2 votes)
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KatTail Verse
Posted 4 years ago. Direct link to KatTail Verse's post “why does the melted glass...”
why does the melted glass look edible
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(2 votes)
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Richard McEwen, or wildchild
Posted 9 years ago. Direct link to Richard McEwen, or wildchild's post “how can to get the stuff ...”
how can to get the stuff to do glassmaking
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(1 vote)
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Richard McEwen, or wildchild
Posted 9 years ago. Direct link to Richard McEwen, or wildchild's post “how do you get the stuff ...”
how do you get the stuff to make glass
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(1 vote)
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American Girl
Posted 9 years ago. Direct link to American Girl's post “I watched the video, but ...”
I watched the video, but didn't earn energy points.Why?
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- Gabrielle Pantano
  Posted 6 years ago. Direct link to Gabrielle Pantano's post “If you watched the entire...”
  If you watched the entire video and didn't earn any energy points I would report it in the help center.
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Light Runner
Posted 9 years ago. Direct link to Light Runner's post “What is the most common m...”
What is the most common mold?
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Light Runner
Posted 9 years ago. Direct link to Light Runner's post “How many molds are there?”
How many molds are there?
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(1 vote)
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Video transcript

(Chinese music) Voiceover: Mold blown glass is made by inflating molten glass in a mold normally made of clay, wood or metal. In the dip mold process, a gather of hot glass is lowered into the mold. As soon as the glass touches the bottom of the dip mold, air is blown into the blow pipe. The grooves inside the mold pattern the glass. However much the bubble is further inflated and shaped, the impressions from the mold will remain in the glass. If the tip of the bubble is held with pincers and the blow pipe is turned, the pattern becomes twisted. Molten glass can also be inflated in a closed mold made of multiple parts. An elongated glass bubble is placed between the open halves of the mold. The mold is tightly closed and air is blown forcefully into the blow pipe. When the glass hardens, the mold is opened and the glass worked free. Closed molds can be used again and again, creating many vessels with the same shape and decoration. (Chinese music)