Lampwork Etc.
 
TrueDesign

LE Live Chat

Enter Live Chat

No users in chat




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 2014-05-23, 6:06am
Lisi's Avatar
Lisi Lisi is offline
one day at a time
 
Join Date: Jun 27, 2005
Location: We are MOVING!!!
Posts: 8,319
Default Cracking and Crazing: the place to list incompatible glass combinations

We have been needing a thread like this for a long time. There are threads about incompatibilities that pop up every now and then only to be forgotten. You can find some of them in the searches, but you may not find the specific info you need. This is why we need ONE thread.

This is the place to list all of your incompatible glass combinations, so dig through your memory and put down all of the disasters you can think of. This will be a service to the glass community to help prevent problems that can not only be disappointing, but also not good for your business if a customer receives broken beads! So far, I have been lucky myself, but there have been a few close calls where I discovered tiny cracks or crazing when editing the photos in Photoshop.

Please list the color combinations you used by color, manufacturer, and how you made the beads. Remember, beads that crack straight down the mandrel are a thermal shock problem, and not incompatibility. If you are not sure, then describe what happened and show a picture if you can, and the rest of us will help you figure it out.

I will start with these:

Lauscha peach transparent base with swirled Effetre coral and white twistie melted in on the surface, donut round beads. So pretty, but a few days later all of them cracked like crazy and fell apart in little pieces.

Recent discovery - Lauscha opaque turquoise stringer decoration over Effetre turquoise base, donut rounds. Tiny hairline cracks where Lauscha meets the Effete.

Effetre light sky blue pastel base, stringer decoration of copper green, opal yellow, and purple 254 EDP (all Effetre), donut round beads. Major tiny crazing all over the beads. I made these twice, about three years apart and got the same exact results, so it was not a batch problem. The copper green, opal yellow, and EDP is a popular and beautiful combination that is problem free, but keep it away from the light sky blue.

Gaffer Amethyst (G-11) frit over Bullseye neo lavender opal, donut round beads. Major crazing. Also the same thing with Kugler K-14 (a transparent violet) over Bullseye transparent neo lavender. This suggests to me that the 96 frits do not do well with Bullseye, so be careful. Or better yet, use Uroboros 96 COE rods as a base for your frit. I have never had a problem with Uroboros and any of the 96 COE frit. I don't use anything larger than size #00 or #0 frit on Effete, Vetrofond, and CiM, meaning I don't take the risk of using size #1 on 104, but that's just me.
__________________
You live in a world of money. Money means choices. No money, no choices. Welcome to reality.
Melody (Marlee Matlin) from Switched at Birth
Reply With Quote
  #2  
Old 2014-05-23, 9:31am
jaci's Avatar
jaci jaci is offline
Glass-aholic
 
Join Date: Mar 21, 2007
Location: CT, tolland CT
Posts: 4,332
Default

I made a twistie of OY, black and R-Opal raspberry (all 104) and Made a small bead with the twistie and encased with effetre rose quarts. The rose quarts literally shelled off! It was so pretty! It also splintered at the ends before sheering into egg shell pieces! (The twistie was fine, no issues w/cracking on anything else)

Anything I have ever made with moody blue encased in anything..... Lots of crazing around dots, down lines, surface everywhere.
__________________
Minor 10lpm Oxy-Con + HH on Propylene . . . . . .

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.


To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.
hand dyed silk ribbons in many colors!
WASHERS & TOPPERS - layering components for interchangeable glass topper and to use in other jewelry/metalwork.:

Last edited by jaci; 2014-06-06 at 10:07am.
Reply With Quote
  #3  
Old 2014-05-23, 12:36pm
EchoTantuli's Avatar
EchoTantuli EchoTantuli is offline
Artistically Absorbed
 
Join Date: Jul 27, 2007
Location: Emerald City
Posts: 546
Default

CIM Cranberry encased in anything. Another lampworker called it Crackberry which is perfect!

Lisi I am kind of shocked about the Kugler not working over Bullseye, but not about the Gaffer. I believe most if not all Gaffer is unleaded...I could be wrong. It is my understanding that the lead in the furnace glass is what gives the flexibility in small amounts.
__________________

To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.
Believe in Yourself and Anything is Possible!
To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.
SRA Artist A64

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.
Reply With Quote
  #4  
Old 2014-05-23, 5:51pm
essiemessy's Avatar
essiemessy essiemessy is offline
Happy Inner Dragon
 
Join Date: Dec 03, 2009
Location: Gold Coast, Australia
Posts: 6,129
Default

I have a very pretty lot of Rubino, in thin rods (about 3mm). Trouble is, it will not be encased. At all. Will crack before it even goes into the kiln :/
__________________
Di - Essie's my wonderbike
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.

rusticalsfreestyle on Instagram

To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.
SRA# P107
Reply With Quote
  #5  
Old 2014-05-23, 7:28pm
Lisi's Avatar
Lisi Lisi is offline
one day at a time
 
Join Date: Jun 27, 2005
Location: We are MOVING!!!
Posts: 8,319
Default

Quote:
Originally Posted by EchoTantuli View Post
Lisi I am kind of shocked about the Kugler not working over Bullseye, but not about the Gaffer. I believe most if not all Gaffer is unleaded...I could be wrong. It is my understanding that the lead in the furnace glass is what gives the flexibility in small amounts.
I was too! So disappointed! The combo with the Gaffer is so beautiful. A good substitute to get those bright lavender hues is to use the BE neo lavender opal as a base, but then use BE Gold Purple transparent frit on the surface. Another good match is Uroboros Cotton Candy Grape opal as a base, and the Gaffer G-11 frit seems to be fine to use with it.
__________________
You live in a world of money. Money means choices. No money, no choices. Welcome to reality.
Melody (Marlee Matlin) from Switched at Birth

Last edited by Lisi; 2014-05-24 at 1:40am.
Reply With Quote
  #6  
Old 2014-05-23, 7:46pm
Eileen's Avatar
Eileen Eileen is offline
Loving learning
 
Join Date: Oct 11, 2010
Location: Florida
Posts: 11,579
Default

I had heard you could use lower COE frit (one step) but not higher, but I've never tried it myself.
__________________
My current "hot" fantasy involves a senior discount on glass & tools!
Reply With Quote
  #7  
Old 2014-05-24, 1:43am
Lisi's Avatar
Lisi Lisi is offline
one day at a time
 
Join Date: Jun 27, 2005
Location: We are MOVING!!!
Posts: 8,319
Default

Quote:
Originally Posted by Eileen View Post
I had heard you could use lower COE frit (one step) but not higher, but I've never tried it myself.
I've never tried anything like that either. I have some Loetz powder which is 93, but I don't know what to use it on.
__________________
You live in a world of money. Money means choices. No money, no choices. Welcome to reality.
Melody (Marlee Matlin) from Switched at Birth
Reply With Quote
  #8  
Old 2014-05-24, 11:23am
LarryC LarryC is offline
Senior Member
 
Join Date: Mar 07, 2011
Location: Northern California
Posts: 2,023
Default

Quote:
Originally Posted by Eileen View Post
I had heard you could use lower COE frit (one step) but not higher, but I've never tried it myself.
What is a step?
Reply With Quote
  #9  
Old 2014-05-25, 10:29am
dianeconroy's Avatar
dianeconroy dianeconroy is offline
Senior Member
 
Join Date: Apr 09, 2010
Location: Iowa
Posts: 542
Default

Quote:
Originally Posted by LarryC View Post
What is a step?
I think they mean that there's 104 coe, 96 coe, 90 coe. You can use the 96 an 90 frit on 104 in small amounts. Not sure many people have tried 104 on our 90 or 96 because most purchased blends are the 90 or 96. There are some available in 104 as well as single colors. i belive that is what they are referring to to by step. You wouldn't try 104 on Boro or vise versa.
Reply With Quote
  #10  
Old 2014-06-06, 4:05am
JulieV's Avatar
JulieV JulieV is offline
JulieV
 
Join Date: Jun 12, 2005
Location: Alberta, Canada
Posts: 1,135
Default

I was trying a 'wave' bead with effetre black and 408 medium yellow. Although I knew the hot colours did not like to be encased, for some reason I thought if the clear encasing glass was a large percentage than yellow, it would be ok. Wrong. It shattered. Literally. (Well at least after it rolled off the counter onto the floor - into a million pieces; more like an explosion)
Peeps in another thread indicated that if you cook the bejeepers out of some colours, it can actually change their Coe. Ya learn something new everyday.
__________________

To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.
Reply With Quote
  #11  
Old 2014-06-06, 5:50am
Kalorlo's Avatar
Kalorlo Kalorlo is offline
Senior Member
 
Join Date: Jan 31, 2010
Location: London, UK
Posts: 358
Default

Don't encase Effetre white with Lauscha peach (I think that one's a viscosity thing). In my case it was a lentil, probably 28-32mm range, which got big curved incompatibility cracks but I've read other people mention it.

I did a bunch of testing of Lauscha soft clear and silver glass. Small cylindrical core of silver glass, struck (if applicable) and reduced, encased thickly and made ribbed rounds with a roller. The below ones did not work and got cracks. (They went into the kiln glowing, garaged and annealed at 520C).

TAG odd light tibet (immediate curved cracks - normal tibet was fine)
TAG deep purple (developed a straight crack in the first week after coming out of the kiln ok)
Double Helix Pandora (immediate curved cracks)
TAG Zeus (immediate straight crack)

CiM celadon base with CIM cirrus dots or full encasing. Curved cracks everywhere in that set after a little while.

I do get incompatibility showing up as straight cracks in small donut beads with dots or round beads sometimes (and I had one that cracked straight along the *outside edge* of a crunch, falling in half that way!)

This one's more for the UK people, but Plowden & Thompson 93coe clear does not *always* work as a core for Reichenbach or Gaffer. (I'll come back and add the specific ones later when I can check the numbers).
__________________

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.
|
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.
|
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.
Reply With Quote
  #12  
Old 2014-06-16, 8:21am
Kalorlo's Avatar
Kalorlo Kalorlo is offline
Senior Member
 
Join Date: Jan 31, 2010
Location: London, UK
Posts: 358
Default

Right, these are the Reichenbach and Gaffer 96 combinations that didn't work with a core of P&T 93coe clear. These were sculptural beads, based on a crunch shape then with additional sticky-out bits on the front. Curved cracks on the backs - I thought the first couple were thermal so reheated to fix, but they came back. (I am also very careful to make sure the back is always heated inbetween steps).

RW0761 iris brown light
RW0191 iris amber
Gaffer G175 Cinnamon
Gaffer G110 gold pink extra

Gaffer gold pink extra also got multiple curved cracks when used over a core of Reichenbach RW0201 crystal clear. Which is annoying!
__________________

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.
|
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.
|
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.
Reply With Quote
  #13  
Old 2014-06-16, 9:42am
helbels helbels is offline
Member
 
Join Date: Sep 20, 2009
Posts: 78
Default

CIM Cranberry Pink over CIM Peace... cracking galore!!
__________________

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.


To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.
Reply With Quote
  #14  
Old 2014-06-16, 1:36pm
Lisi's Avatar
Lisi Lisi is offline
one day at a time
 
Join Date: Jun 27, 2005
Location: We are MOVING!!!
Posts: 8,319
Default

Quote:
Originally Posted by Kalorlo View Post
Right, these are the Reichenbach and Gaffer 96 combinations that didn't work with a core of P&T 93coe clear. These were sculptural beads, based on a crunch shape then with additional sticky-out bits on the front. Curved cracks on the backs - I thought the first couple were thermal so reheated to fix, but they came back. (I am also very careful to make sure the back is always heated inbetween steps).

RW0761 iris brown light
RW0191 iris amber
Gaffer G175 Cinnamon
Gaffer G110 gold pink extra

Gaffer gold pink extra also got multiple curved cracks when used over a core of Reichenbach RW0201 crystal clear. Which is annoying!
Try a clear base of R-100 which is leaded, so it will be a lot more compatible with these frits that have lead in them. R-201 is lead-free, so that was probably the reason for the cracking.
__________________
You live in a world of money. Money means choices. No money, no choices. Welcome to reality.
Melody (Marlee Matlin) from Switched at Birth
Reply With Quote
  #15  
Old 2014-06-16, 5:18pm
KJohn's Avatar
KJohn KJohn is offline
Slogan Challenged...
 
Join Date: Mar 21, 2009
Location: Maricopa, Arizona
Posts: 5,936
Default

Has anyone tried to encase Sandalwood Ivory? I tried two yesterday and no go. Not shy little cracks either.
__________________
Kristin ~

Facebook:
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.

Etsy:
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.
Reply With Quote
  #16  
Old 2014-06-16, 7:05pm
Mountain Snail's Avatar
Mountain Snail Mountain Snail is offline
Senior Member
 
Join Date: Oct 08, 2010
Posts: 855
Default

R opal raspberry and bubblegum pink didn't work well together for me.
Reply With Quote
  #17  
Old 2014-06-17, 11:58am
bluhealer bluhealer is offline
Jer. 29:11, Prov.10:19
 
Join Date: Jun 29, 2005
Posts: 487
Default

Quote:
Originally Posted by KJohn View Post
Has anyone tried to encase Sandalwood Ivory? I tried two yesterday and no go. Not shy little cracks either.
Sandlewood doesn't play well with other colors at all for me.
Reply With Quote
  #18  
Old 2014-12-17, 7:30am
designerbeads's Avatar
designerbeads designerbeads is offline
Senior Member
 
Join Date: Oct 02, 2007
Location: Toronto
Posts: 438
Default

in general I try not to encase opals

I had issues with leaky pen and effetre clear so I switched to cim clear

one batch of clio did not like encasement, might have been some seconds I bought but they got mixed up so sad face...
__________________

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.
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 9:59am.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
Your IP: 44.201.95.84