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Old 09-19-2004, 07:57 PM   #1
MRtwo
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Default Why does porcelain break glass so easily?



I have known about this for a long time but never bothered asking but I'm sure OT has the answer.
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Old 09-19-2004, 07:58 PM   #2
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Because its harder?
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Old 09-19-2004, 08:03 PM   #3
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Quote:
Originally Posted by Cyberdemon
Because its harder?
Maybe? All I know is that a small piece of it can shatter a car window as easily as a brick.
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Old 09-19-2004, 08:03 PM   #4
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Originally Posted by Cyberdemon
Because its harder?
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Old 09-19-2004, 08:06 PM   #5
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because is fragile, dumbass!
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Old 09-19-2004, 08:07 PM   #6
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Originally Posted by Soyelflaco
because is fragile, dumbass!
It's Italian?
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Old 09-19-2004, 08:08 PM   #7
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Quote:
Originally Posted by Soyelflaco
because is fragile, dumbass!
Anyone else see the irony there??
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Old 09-19-2004, 08:14 PM   #8
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Quote:
Originally Posted by Soyelflaco
because is fragile, dumbass!
so are feelings
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Old 09-19-2004, 08:14 PM   #9
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I'm perplexed by this statement and need more information before i even begin to think of why.
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Old 09-19-2004, 08:23 PM   #10
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On the Mohs hardness scale (used in geology)

Glass has a hardness of 5.5 out of 10. Porcelain has a 6.5 to 7 hardness.

So porcelain is harder



Mohs, not Hohs.

Last edited by subiekid; 09-19-2004 at 10:47 PM.
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Old 09-19-2004, 08:27 PM   #11
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Yo momma is a hoh.

(It's Moh's)
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Old 09-19-2004, 08:27 PM   #12
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Quote:
Originally Posted by subiekid
On the Hohs hardness scale (used in geology)

Glass has a hardness of 5.5 out of 10. Porcelain has a 6.5 to 7 hardness.

So porcelain is harder
*Mohs scale.*

I was too lazy to look into it, but i don't think it would break easily, just break beofre the glass does.
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Old 09-19-2004, 08:41 PM   #13
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Head is harder than porcelain. Dont pass out while pissing
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Old 09-19-2004, 09:11 PM   #14
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breaks easy compared to what? There is no answer to your super-generic question.


-Jake

How about this: why do things do stuff?
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Old 09-19-2004, 09:51 PM   #15
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porcelain is denser than glass?
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Old 09-19-2004, 10:46 PM   #16
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opps, yea its Mohs, not Hohs. Typo.
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Old 09-20-2004, 03:46 AM   #17
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Quote:
Originally Posted by Unsung Boxer
breaks easy compared to what? There is no answer to your super-generic question.


-Jake

How about this: why do things do stuff?
There is no need to compare it to anything. I just asked because I hear about people taking small peices of porcelain from broken spark plugs and throwing them at car windows and it shatters the glass. I rock the same size would be damn near impossible to break a window with by just throwing it. I just wanted to know why it does that.
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Old 09-20-2004, 03:49 AM   #18
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Quote:
Originally Posted by MRtwo
There is no need to compare it to anything. I just asked because I hear about people taking small peices of porcelain from broken spark plugs and throwing them at car windows and it shatters the glass. I rock the same size would be damn near impossible to break a window with by just throwing it. I just wanted to know why it does that.
Have you ever done this or seen it happen? I'm calling BS.

I hear this lady named cleo can see into the future. How does she do that?
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Old 09-20-2004, 03:50 AM   #19
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harder also means more brittle.
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Old 09-20-2004, 03:52 AM   #20
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Quote:
Originally Posted by mattjk
harder also means more brittle.
Not always. See diamonds.
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Old 09-20-2004, 03:54 AM   #21
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Quote:
Originally Posted by chri3
Not always. See diamonds.
very true. Gotta watch those broad statements.
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Old 09-20-2004, 04:02 AM   #22
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Quote:
Originally Posted by mattjk
very true. Gotta watch those broad statements.
I think that is only true is some cases, cause i've hit a bunch of rocks with my rock hammer that did nothing but dented the metal hammer and did not even chip(see limestone). I wish i had more insight, but i don't...hopefully in a few weeks i will.....im taking minerology this quarter starting fri.
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Old 09-20-2004, 04:10 AM   #23
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Quote:
Originally Posted by chri3
I think that is only true is some cases, cause i've hit a bunch of rocks with my rock hammer that did nothing but dented the metal hammer and did not even chip(see limestone). I wish i had more insight, but i don't...hopefully in a few weeks i will.....im taking minerology this quarter starting fri.
Chri3 is a geology major
Ask your teachers if they have ever wanted to teach at the University of Idaho. My geology teacher keeps saying how we have such interesting geology and how all the people from harvard and other schools come here to study things.
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Old 09-20-2004, 04:49 AM   #24
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Quote:
Originally Posted by chri3
Have you ever done this or seen it happen? I'm calling BS.
I have etched glass with porcelain. It really does dig deep into it. I have never tried to break glass with it but I have heard many stories about it. Its definitely not BS.
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Old 09-20-2004, 05:01 AM   #25
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Quote:
Originally Posted by MRtwo
I have etched glass with porcelain. It really does dig deep into it. I have never tried to break glass with it but I have heard many stories about it. Its definitely not BS.



Glass=quartz.(7)
Streak plate=unglazed porcelain(7.5)

if you want more info look here: http://geology.csupomona.edu/alert/mineral/hardness.htm
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