anyone have trouble with frit work cracking?

[GlassFreak]

i have been using my jade powder and my star white small frit for some pieces lately, i havnt had any problems with the white star but the few pieces ive made out of the jade powder have cracked some time durring cooling... this is wierd cuz ive used it befor on the outside of things with no problem, but now im using it for deeper iso work and its cracking?

i really like the look it gives. maybe i should just melt everything in even more? i blow out and condense a few times to get the look i want, but maybe there is places on the inside where it has built up in a glob or something that im not melting all the way in?

any input would be appreciated

[jello]

Try making a small encased bead... This way you can see if you have melted in everything, and if it cracks then you know. I've used jade alot and sometimes I have problems, encased and outside.. Some times it's checks and sometimes It don't. Too much powder? Globs? Make sure it's all even... Let us know if you Fonda solution

[metalbone]

black lightening inside looks great, but cracks to high hell...

[GlassFreak]

k thanks jello, its hard to get it evenly coated on the inside, something ill have to work on.

[jello]

To get a even coat I heat small sections at a time. I also measure out frit for each section, that way I know I useing the same ammount everytime, eventually you will get the hang of making it even... Also u blow out condense, blowout condense... Etc.... But you are doing that already... Goodluck bro

[GlassFreak]

yea im sure i need to blow out and condence a few more times toward the bowl, thats where its happening.

[ralph]

Dude, stay away from any Jade on the inside!!!! Powder on the surface looks nice.

[GlassFreak]

ralph- experience with this i take it? like i said i used it on the outside no prob but this is the first time ive used it ISO, thanks for savin me the trouble of making another batch for nothing.

[MUPH]

I've never used Jade but you might be garaging too hot/long. Try to avoid long periods of time at temps above 1000 maybe?

[jr23]

when I first started I could say frit and have a piece crack.


Now I use it .

Try the magnet

review you broke piece from inside look for unmelted sections.

and the wrong batch of jade ?

[GlassFreak]

muph that could have been the problem, i did leave the jade pieces garaging for a while, i had to pick someone up, and then i made the white ones and took them all off the tubes... so shit... oh well i wont be using the jade on iso any more, so if this happens with another color ill be confused.

[dew]

i just got some mystery aventurine frit (large) and was wondering if anyone knows if it can be used inside out. i think it would look great, but i feel like it'll crack. just curious if anyone knows before i go trying it out.

[CDot]

i use jade for iso spoons all the time without any cracking i usually only puff a piece one time when shaping each section. i would def run some earth magnets through whatever frit you are going to use each day. i like using powder instead of fine frit because it melts in a lot quicker, but i also use fine size frit. as for the mystery aventurine im not sure but iso stringers of it look awesome...

[GlassFreak]

earth magnets? thats cool, is there pieces of metal in it?

[Lucius Emanuel]

i was thinking the same thing---earth magnets??

[MUPH]

When color companies crush the frit, sometimes parts of the crusher can break off and get mixed in with the frit. A magnet will take out any pieces of metal within the frit.

If your going to use mystery adventurine for I/O, try not to garage at high temperature for long periods of time. I keep mine under 1000 for chrome/sparkle colors until I run my striking schedule

[J Howard]

jade can get cracky if you over reduce it. since you're using it in powder form now, it's more prone to reduction. there's lots of surface area in the fine particulate and you're probably frying the chromium. i believe reduced chromium has a COE in the 50's

do you know how to do a neutral flame test? GA has some literature out there for it

i love jade. great color great tone. i have no problems using in inside out.

one more thing: i hope you have excellent ventilation for jade powder. that's probably the most toxic color you can be using. in powder form, you're really exposing yourself to some nasty stuff. if you were to light a piece of paper towel on fire and set it in front of your torch, can you smell it? if you can, your ventilation is not good enough

[GlassFreak]

well fuck thats scarry, i only have a shop fan in in the window in front of me, i dont think its that good... ill have to just stick that shit back in the back of my box till i get better venting.

[LunacyMountain]

I make iso frit stuff all the time, but I find I have to blow it out at least 3 times usually more to get it melted in all the way.

[Glassroots]

one more thing: i hope you have excellent ventilation for jade powder. that's probably the most toxic color you can be using. in powder form, you're really exposing yourself to some nasty stuff. if you were to light a piece of paper towel on fire and set it in front of your torch, can you smell it? if you can, your ventilation is not good enough

I wonder about this too with color on the inside that is blown. When you blow into a tube, a little bit of heat and vapor blows back into your mouth. I have long stopped using techs like fuming and color on the inside for that very reason. Any thoughts?

Why is jade in particular so harmful?

[smolder holder]

I know there is chromium it jade (not sure what else) on top of good old silicosis. Careful folks if you have any doubts about your ventilation err on the side of don't fuck with powders until you have a safe situation.

[smolder holder]

^^ hopefully I'm preaching to the chior on this one.

[Albino Sasquatch]

i hate powder for iso it piles up and gets all shitty in there. the fine stuff works good for me and unless its a dark color i can melt it in without even puffin. although you may need a torch like a gtt to really get that penitrating heat in there fast. alot of other torches work a little slower geting the heat in for some reason