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Infinity glass
05-22-2007, 04:03 PM
Ok I am talking to a graphite manufacturer. They have 4 dif grades of graphite. I have no idea what is the best one to choose for glass any suggestions? Here is the list of grades

KWA
Bulk Density: 1.8g/cm3 Min
Compressive strength: 65Mpa Min
Flexural strength: 35Mpa Min
Electrical resistance: 8.5μΩm Max
Grain size: 0.04mm Max
Ash：0.1%Max
KWB
Bulk Density: 1.76g/cm3 Min
Compressive strength: 55Mpa Min
Flexural strength: 30Mpa Min
Electrical resistance: 8.5μΩm Max
Grain size: 0.08mm Max
Ash：0.1%Max
KWC
Bulk Density: 1.72g/cm3 Min
Compressive strength: 35Mpa Min
Flexural strength: 17.5Mpa Min
Electrical resistance: 10μΩm Max
Grain size: 0.8mm Max
Ash：0.2%Max
KWD
Bulk Density: 1.58g/cm3 Min
Compressive strength: 15Mpa Min
Flexural strength: 8.5Mpa Min
Electrical resistance: 11.5μΩm Max
Grain size: 4mm Max
Ash：0.3%Max
ech
05-22-2007, 04:21 PM
I beleive the denser the better. So the 1.8gm/cm3 would be the best.
gotglass?
05-23-2007, 04:18 AM
yup look at the grain size also tool makers are always touting how they use "fine" graphite
canaan
05-23-2007, 06:15 AM
Make sure you hit up John, over at Weaver industries.

John is a great guy, uses only high density, high quality graphite, and will make ANYTHING you need, want, or wish for - at more than reasonable rates.

We hit him up a few years ago for some stock, and scraps, and since then he's sidestepped from Weavers normal manufacturing circle to include the needs of lampworkers as well.

He's a hell of a guy, and knows his shit.
seadal
05-23-2007, 11:32 AM
Carbone of America sells there odd sizes for a great price. You have to buy 200lbs. but hey its only $3 an lb. This was a couple years ago back when I was selling tools.

Go off the grain size. The samller the grain the happier the lampworkers. KWA and KWB.
UmaJulz
05-23-2007, 01:41 PM
super fine grain makes it sso much nicer. I have two paddles, very different grades, and definitely a different feel to them. the cheap-o looks like shit compared to the fine grain one.
vetropod
05-23-2007, 01:49 PM
The rough-grained graphite "sweats" when it gets hot, so try and stay away from that! Annoying stuff...
cheng076
05-23-2007, 04:06 PM
Try "The Graphite Store". Talk to Vlademir. Very knowledgable and will do you a good deal. Sorry I don't have the link.
PJ
Miss Kate
05-23-2007, 06:54 PM
Is this it?

http://www.graphitestore.com/index.asp

Miss Kate