WARNING TO ALL WOOD TURNERS...

[maxwellsmart007]

I'm in the same boat as Doug - the CA smoke I've seen has always been white...

[TDHofstetter]

How ODD.

Countless writeups I've read about CA always talk about WHITE smoke.

Can we duplicate it if we try? I'd like to narrow it down if we can, eliminate the variables.

[triplefreak]

Apr 23, 2010 10:21:31 GMT -6 TDHofstetter said:

How ODD.

Countless writeups I've read about CA always talk about WHITE smoke.

Can we duplicate it if we try? I'd like to narrow it down if we can, eliminate the variables.

Be my guest. Once was more than enough for my liking.

[TDHofstetter]

I was hoping you'd try it out in the driveway or something - that way we'd be sure to get the same brand of gloves & the same brand of CA, & if the wood dust had anything to do with it there'd be some there, too...

[deepsplinter]

Sorry TF, but you know about the "N.P, D.H." rule.

And if Tim can't figure it out, well there you have it.


Kiddin' kiddin'

I'd like to get Monty's take on this one.

[triplefreak]

Apr 23, 2010 12:05:54 GMT -6 TDHofstetter said:

I was hoping you'd try it out in the driveway or something - that way we'd be sure to get the same brand of gloves & the same brand of CA, & if the wood dust had anything to do with it there'd be some there, too...

I'll be glad to mail you some gloves, & even the same paper towels I was using. You'll have to supply the thin CA on your own.
It came from Ryan at Woodturninz.com.

I seriously was scared out of my pants. Brown smoke= bad, in anyone's book.

[TDHofstetter]

Here are some thoughts (I'm not ready to buy CA 'cause I hardly ever use it). I'm thinking the brown smoke was purely a product of the nitrile breakdown, a rubber smoke.

Nitrile butadiene (the stuff they make into gloves) starts breaking down at a temperature just higher than that of boiling water. BARELY higher. So... I think the curing CA exceeded that temperature (sometimes, especially when it's accelerated by baking soda or raw humidity, it can really get nasty hot), and so the nitrile broke down & began smoldering, producing the smoke.

Cure - I dunno. Either don't let the CA get so hot (lower humidity or less accelerator) or apply it with something that can withstand higher temperatures or that has a higher specific temperature because of greater mass.

My guess.

[Stretch]

Apr 23, 2010 15:30:00 GMT -6 TDHofstetter said:

Here are some thoughts (I'm not ready to buy CA 'cause I hardly ever use it). I'm thinking the brown smoke was purely a product of the nitrile breakdown, a rubber smoke.

Nitrile butadiene (the stuff they make into gloves) starts breaking down at a temperature just higher than that of boiling water. BARELY higher. So... I think the curing CA exceeded that temperature (sometimes, especially when it's accelerated by baking soda or raw humidity, it can really get nasty hot), and so the nitrile broke down & began smoldering, producing the smoke.

Cure - I dunno. Either don't let the CA get so hot (lower humidity or less accelerator) or apply it with something that can withstand higher temperatures or that has a higher specific temperature because of greater mass.

My guess.

I think you're right. Curing CA glue can give off a whole lot of heat and it really wouldn't take much to get a nitrile glove to burn.

[monty]

I have two different brands of nitrile gloves (from Harbor Freight). I took one of each out and layed them on the sidewalk and literally poured thin CA on them. No reaction. I then hit it with accelerator. They gave off the usual white smoke and the CA foamed up and hardened. No combustion.
I thought maybe there was some BLO present so I placed a small amount of BLO on the gloves added a liberal amount of thin CA.......nothing. Sprayed with accelerator and got the same reaction as before but still no combustion.
For a final try, I sprayed the glove with accelerator until it was "wet". Added thin CA and got the same reaction but it was a little more "violent", but still no combustion although I could hear it sizzle.
After every test, the glove was very hot to the touch, enough to be very uncomfortable but not to burn. I imagine if I would have had them on, it might have blistered me during the reaction.
In none of the tests did I get a brown smoke, only the "normal" white that is sometimes seen.
The only explanation I can offer is the brand of CA you are using reacts hotter than mine or your glove may have been contaminated with something else or there was something on your bench that ignited.

[sachbvn]

Thank you Mannie.


Zac

[Doug B]

Yeah, thanks for the testing Monty! I feel better about it now since I use your CA. I'm guessing that the brand of CA is the difference.

[Ruffnek]

Not just the brand of CA but that particular bottle may have been "hotter" than usual. I suspect the QC at some companies isn't as stringent as it is at others.