NRG
fully equipped rock polisher
Member since February 2018
Posts: 1,688
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Post by NRG on Jul 6, 2018 11:38:23 GMT -5
Why are air bubbles in glass under pressure? Intuition informs the opposite. Thanks Well Scott, is it called the ideal gas law ? pressure = temp/volume ? somehow it may be involved. Or gas is being generated chemically at a lower temp reaction during cooling. rest assured those bubbles must be have several 100 psi. release that to a sealed rubber rotary vessel and all hell must break loose. I get ya, cooling should reduce pressure. That part is simple. Those bubbles were sealed up at pretty high temps. At such high temperature the gases expand and the density of air is very low. I expect the bubbles at room temp to be full of near vacuum! An implosion should take place. Must be chemical reaction or some stuff. |
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jamesp
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Member since October 2012
Posts: 36,612
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Post by jamesp on Jul 6, 2018 11:41:56 GMT -5
The small photo to test if anyone was looking. that brick went like clock work. Many of the glass fusers seemed totally intimidated by such. Man I read procedures for doing big brick, said to do crazy stuff like full heat(1500F) and anneal for days at a time. That brick out of the kiln in less than 24 hours, seems solid9as a brick). I will continue to max out my kiln to the largest brick I can fit in it.. It makes $$$ sense to get the most out of each firing. "Maggots", it was supposed to be "Psycho". I doubled the thickness and that must have prevented the Psycho pattern. Probably because the thinner brick heated up quicker and the bubbles carried the more liquified glass up thru the others causing more disturbance. :    Those are turning out fantastic How long will it take to get some out to the knappers and get your return product? Sent 4 boxes of blanks out yesterday Allison. Will do another 4 next week, and the week after that. Guessing I might start seeing glass spearheads in a week or two. Impatient ? I am. Pay me in glass spearheads, screw money. I love to trade. Many trades well surpass money. Like giving you guys that glass, look at all that sugar I got out of it. about time I send y'all some more. I don't have dumbass tattooed on my forehead. I am a bit of a manho, I hand those things out wherever I go. Very faithless lol. Sorry |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,612
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Post by jamesp on Jul 6, 2018 11:46:30 GMT -5
Thanks Well Scott, is it called the ideal gas law ? pressure = temp/volume ? somehow it may be involved. Or gas is being generated chemically at a lower temp reaction during cooling. rest assured those bubbles must be have several 100 psi. release that to a sealed rubber rotary vessel and all hell must break loose. I get ya, cooling should reduce pressure. That part is simple. Those bubbles were sealed up at pretty high temps. At such high temperature the gases expand and the density of air is very low. I expect the bubbles at room temp to be full of near vacuum! An implosion should take place. Must be chemical reaction or some stuff. Gotta be Scott. That was my deduction. There is almost a phase change but not really. I believe boiling point of glass is much higher than fuse point. If you boil glass you will get bubbles generated. It could be the metals boiling ? "Glass has a structure in which a polymeric silicate network, rather like the network in silica but more open and irregular, is held together by very strong covalent forces, and excess negative charge is neutralised by different cations. Silica boils at 2230 C" |
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NRG
fully equipped rock polisher
Member since February 2018
Posts: 1,688
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Post by NRG on Jul 6, 2018 11:53:01 GMT -5
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,612
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Post by jamesp on Jul 6, 2018 11:53:57 GMT -5
I do not care what you call them, but those slabs are cool. Can see where they would appeal to many. Yea if I don't show too many people what can be done with this "Hot Mess" glass as they call it. It has a bad reputation for fusing because it devitrifies and won't kiln polish. Every one was bad mouthing it at first. I probably should not have posted these melts on the fusing forum, glass people amazed. Worried about getting my discontinued stock now. I figured those people had done all this stuff I am doing to this glass. I must have opened some new doors with it. Beginner's luck apparently. Hell I was a process engineer for years, that's what guys like me do. Take things as far as they will go and try crazy stuff. I'll be getting my trailer ready and picking that glass up ASAP. |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,612
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Post by jamesp on Jul 6, 2018 11:59:23 GMT -5
Just what I need to read however I have not dedicated much time to bubble study. I know the "Psycho" pattern is a product of bubbles rising and pulling colors up thru the melt brick as they rise. I know copper oxide can be spread out below a melt brick to create yet more bubbles for color mixing. These methods are on my agenda. Psycho patterns from lateral movement and rising bubbles These were just shards laid flat, the rising and lateral moving bubbles is what terrorized the color layers  |
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Post by fernwood on Jul 6, 2018 12:16:42 GMT -5
Might be time to keep your processes secret. Only share with those you trust will not duplicate what you are doing. You are on to something. I have no formal training as an engineer or chemist, but those areas have always appealed to me. Tested into that as my greatest aptitude in the 70's. Chose Human Services instead. Look where that got me, lol.
I was my husband's consultant for an engineering project him and others received a patent on. I discovered what was wrong with the process. He took my advice, they made some changes and it worked.
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Post by MsAli on Jul 6, 2018 12:19:00 GMT -5
Those are turning out fantastic How long will it take to get some out to the knappers and get your return product? Sent 4 boxes of blanks out yesterday Allison. Will do another 4 next week, and the week after that. Guessing I might start seeing glass spearheads in a week or two. Impatient ? I am. Pay me in glass spearheads, screw money. I love to trade. Many trades well surpass money. Like giving you guys that glass, look at all that sugar I got out of it. about time I send y'all some more. I don't have dumbass tattooed on my forehead. I am a bit of a manho, I hand those things out wherever I go. Very faithless lol. Sorry Pimping your glass, uh huh I see how you are now  Im a tad impatient, cant wait to see what they look like |
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Post by toiv0 on Jul 6, 2018 15:01:57 GMT -5
Go big or stay at home. They said 5000 for it. Come and get it.   |
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Post by fernwood on Jul 6, 2018 15:17:57 GMT -5
OMG. Just what you need jamesp. Would it fit in your basement? lol. |
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Post by parfive on Jul 6, 2018 16:33:35 GMT -5
The odd cremation now and then would help w/utility bills.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,612
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Post by jamesp on Jul 6, 2018 18:23:19 GMT -5
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,612
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Post by jamesp on Jul 6, 2018 18:28:00 GMT -5
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,612
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Post by jamesp on Jul 6, 2018 18:29:28 GMT -5
OMG. Just what you need jamesp. Would it fit in your basement? lol. It's not the size, it's what you can do with it  ? |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,612
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Post by jamesp on Jul 6, 2018 18:39:25 GMT -5
Sent 4 boxes of blanks out yesterday Allison. Will do another 4 next week, and the week after that. Guessing I might start seeing glass spearheads in a week or two. Impatient ? I am. Pay me in glass spearheads, screw money. I love to trade. Many trades well surpass money. Like giving you guys that glass, look at all that sugar I got out of it. about time I send y'all some more. I don't have dumbass tattooed on my forehead. I am a bit of a manho, I hand those things out wherever I go. Very faithless lol. Sorry Pimping your glass, uh huh I see how you are now Im a tad impatient, cant wait to see what they look like Have you known me not to show what I got ? Certain you will get an eyeful before it's over. They have 5 crates, each with 700 or 1400 pounds of plate glass. 6300 pounds total import glass. Total order for a store and is unpicked, full color range. My trailer holds 7000 pounds. So I can get those fork lift items in one trip. Then there is half that much in retail size thin plate and frit. I can carry that out on carts. No trailer needed. The other ~20,000 pounds is fine US glass but all the good colors have been taken away so it severely lacks color diversity. Not so good. |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,612
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Post by jamesp on Jul 6, 2018 18:40:41 GMT -5
That thing would keep your home warm in Minnesota winter toiv0. |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,612
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Post by jamesp on Jul 6, 2018 18:43:29 GMT -5
Might be time to keep your processes secret. Only share with those you trust will not duplicate what you are doing. You are on to something. I have no formal training as an engineer or chemist, but those areas have always appealed to me. Tested into that as my greatest aptitude in the 70's. Chose Human Services instead. Look where that got me, lol. I was my husband's consultant for an engineering project him and others received a patent on. I discovered what was wrong with the process. He took my advice, they made some changes and it worked. Moved to this farm life half my life 30 years ago. My overall'ed farm neighbors are some of the most diverse engineer's I have ever met. Talk about jack of all trades and great at every one of them. |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,612
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Post by jamesp on Jul 7, 2018 3:49:25 GMT -5
Might be time to keep your processes secret. Only share with those you trust will not duplicate what you are doing. You are on to something. I have no formal training as an engineer or chemist, but those areas have always appealed to me. Tested into that as my greatest aptitude in the 70's. Chose Human Services instead. Look where that got me, lol. I was my husband's consultant for an engineering project him and others received a patent on. I discovered what was wrong with the process. He took my advice, they made some changes and it worked. Apparently the Psycho pattern is revolutionary in the eyes of glass fusers. Movement and/or flow of glass is somewhat limited. You can open the furnace and mix your melt. Or put it in a bowl with holes suspended above and melt the glass so that it mixes as it pours thru hole. Make pile of glass and let it collapse into a puddle causing mixing. Etc. Brick molding is not practiced so much in fusing. There was bubble mixing in Psycho but I figured out what really made the psychedelic pattern. One wall of the brick mold failed on that melt and about 1/2 the glass rolled out of the mold. It was the flow out that made the psychedelic pattern. Of course the geometry and color stacking of the glass has a big role. So, make a mold that is in proportion of two squares say 8"x16". Fill one of the 8x8 sides with your glass and let it melt over and fill the whole 8x16 cavity. That would provide the mixing that should replicate Psycho. Sort of a wave mix motion. Next melt. Yes, don't tell the fusers. |
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Post by toiv0 on Jul 7, 2018 6:45:01 GMT -5
That thing would keep your home warm in Minnesota winter toiv0 . The guy who runs it says it will belch fire out of its exaust when they crank it up. It probably burns more fuel in one day than I do in a year. |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,612
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Post by jamesp on Jul 7, 2018 7:33:02 GMT -5
That thing would keep your home warm in Minnesota winter toiv0 . The guy who runs it says it will belch fire out of its exaust when they crank it up. It probably burns more fuel in one day than I do in a year. This 7000 watt kiln being fired regular uses lees electricity than the 1/3HP rotary running 24/7. on off on off, it switches. Never stays on more than 4 seconds. |
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