On 20 Dec 2013 00:13:35 GMT, "DoN. Nichols"
wrote:

On 2013-12-18, Larry Jaques wrote:
On 18 Dec 2013 04:53:45 GMT, "DoN. Nichols"
wrote:

[ ... ]

And I've never seen a label on the paint warning about shaking
it, but I *have* seen such a warning label about aluminum paint on a
paint shaker bolted to a vertical floor-to-ceiling I-beam at work (a
later job) This was one of the kind which cranks two flat plates down on
each end of the can and shakes it around a horizontal axis through the
middle of the can half way between the two ends.

Do you recall what it said? What type of warning was it? Mess or
explosion?

Just "Do not use to shake aluminum paint!" (in big red letters,
IIRC. :-)

OK.


[ ... ]

I'd like to see a real explanation--a quick search on manufacturers'
sites didn't bring anything to light.

I would too. But the one about the "tung oil" makes a certain
amount of sense.

I know people who have had smoldering fires from catalyzing oil finish
rags, so it's not just hearsay. I dry mine on the sidewalk for a week
before putting them in a trash can. Why take chances? When they're
hard, they're safe. Wet and crumpled, they get hot to the touch. My
first clue was picking up a hot rag in a cold shop. That brought the
warning home to me.

I've always believed the warnings I learned in elementary school
science class, but I've not worked with those materials. I tend to also
put oily rags in a metal trash can, not a plastic one. :-)

Ditto.


My two favorite wood finishes, Watco and Waterlox, are both catalyzing
oils and prone to that.

O.K. So the remaining question is:f

"How hot can a half-full can of this get if shaken?"

No idea. As I said, I always 'argon it' if I don't have any Bloxygen
handy. (can of inert gas) http://tinyurl.com/mtryn95
Only $12.75 for a full twelve gram can.

--
I merely took the energy it takes to pout and wrote some blues.
--Duke Ellington