Lampwork Etc.
 
AKDesign

LE Live Chat

Enter Live Chat

No users in chat


The Flow

Beads of Courage


 

Go Back   Lampwork Etc. > Library > Tips, Techniques, and Questions

Tips, Techniques, and Questions -- Technical questions or tips

Reply
 
Thread Tools
  #1  
Old 2011-01-27, 1:05pm
queeniebead queeniebead is offline
Junior Member
 
Join Date: Sep 19, 2010
Location: Chicago, IL
Posts: 24
Default Devit?

Ok, I feel silly, but I've read about devit but I don't really know what it means. Can someone explain/post examples?? Thanks!
Reply With Quote
  #2  
Old 2011-01-28, 5:52am
j2canoe's Avatar
j2canoe j2canoe is offline
thecoralcat
 
Join Date: Jul 16, 2009
Location: Upstate South Carolina about 20 minutes south of Asheville, NC
Posts: 1,555
Default

Devit is when part of your color separates and appears to "boil" out on your bead. It is the pits - literally!!! It is a major PITA!! I don't think people have a lot of devit pics hanging around as, at least in my studio, the bead is banished rapidly - hopefully never to darken my door again!! If you want to see it for yourself - take some EDP (the name stands for Evil Devitrifying Purple) and heat it up pretty good then cool it and then reintroduce it to the flame a couple of times without heating it up thoroughly. I hope this helps!
__________________

To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.

The Victorian Style Floral available now!
To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.
NEW TUTORIAL!
Joan - Ancient Creator of Unique Disasters in glass!
Reply With Quote
  #3  
Old 2011-01-28, 8:37am
RSimmons's Avatar
RSimmons RSimmons is offline
Senior Member
 
Join Date: Aug 01, 2005
Posts: 2,159
Default

Devitrification means that your glass has formed crystals at some level rather than remaining in the amorphous (non-crystalline) state. This will leave you with a dull, sort of frosted look to the surface of your glass. Not as nice as deliberately etched. Somewhere on LE I have some microscope images of old glass that has devitrified naturally, just don't know where the thread is at the moment.

Robert
__________________
Robert Simmons
(Former) Director for Bead Donations
Beads of Courage, Inc.
Reply With Quote
  #4  
Old 2011-01-28, 8:40am
jamie lynne's Avatar
jamie lynne jamie lynne is offline
Tweedle Dumb
 
Join Date: Jan 16, 2009
Location: Dolphins are just gay sharks.
Posts: 1,934
Default

http://lampworketc.com/forums/showthread.php?t=154660
__________________
Jamie Lynne (aka Bitty)
To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.
<Click For My Latest Murrini!

To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.
<Click! For Pandora Style Beads!
Reply With Quote
  #5  
Old 2011-01-28, 8:43am
queeniebead queeniebead is offline
Junior Member
 
Join Date: Sep 19, 2010
Location: Chicago, IL
Posts: 24
Default

thanks!! luckily, i don't think i've experienced this yet... haha!
Reply With Quote
  #6  
Old 2016-07-16, 1:52pm
jdleigh jdleigh is offline
Junior Member
 
Join Date: Apr 27, 2008
Posts: 17
Default

I see Joan's reply to 'what is causing devitrification??' and I am sort of a newbie just now experiencing devit with my EDP (surprised?). The bead appears almost as if it has been etched. My question: Am I too close in the flame (Carlisle Mini CC)? Do I have too much Propane running? Do I need to work cooler? Or is it just when you come out of the flame and go back in, then go out, then come back in (it is happening as I try to reduce things along with my EDP as well). Any replies would be so very welcomed!
Reply With Quote
  #7  
Old 2016-07-16, 2:15pm
Eileen's Avatar
Eileen Eileen is offline
Loving learning
 
Join Date: Oct 11, 2010
Location: Florida
Posts: 11,650
Default

EDP does not like being warm then hot, back and forth. The good news is that after you are done creating your bead, you can let it cool a bit, then bring it back into the back of the flame, and heat the bead until just the surface glows orange and gets shiny, then pull it out and (still turning of course for the whole thing) carry it to the kiln and pop it in.
More information here, and you may need to register to see it. Wet Canvas forums,

http://www.wetcanvas.com/forums/show...+dreamy+purple
__________________
My current "hot" fantasy involves a senior discount on glass & tools!
Reply With Quote
  #8  
Old 2016-07-17, 1:54am
Speedslug's Avatar
Speedslug Speedslug is offline
Phill
 
Join Date: Mar 21, 2009
Location: Winnebago, MN
Posts: 2,489
Default

Devit is the problem of the glass crystalizing as it cools into individual grains instead of solidifying as one whole crystal.

Some colors are more prone to it ( like EDP ) but over working the glass in the heat can cause it as well even in colors that are not so prone to it.

Sometimes you can coax it back out of devit and sometimes you can not.

Remember that the yellow flare we see with out our diddys on is sodium turning into a gas and burning off so the glass chemistry is changing little by little while it is in the flame.

Some of the window and bottle glass I have played with has gotten a whole lot stiffer and harder to melt because I spent too much time playing with it in the flame.
__________________
The Zombie Apocalypse is Upon Us.
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump




All times are GMT -7. The time now is 7:18pm.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Your IP: 44.201.131.213