Dry ice

When I needed some dry ice to shrink some steel, I went to (in Philly) the Jack & Jill Ice Cream Company (which was closest to us of that kind of business).  They, along with Good Humor, use dry ice in their trucks.  It was cheap and easy.

Im sure back in the early 1950's they used ice in their trucks.


Now the trucks are refrigerated.


-Andy

After calling around, a pound of dry ice is very small. So small in fact, transport for over an hour would melt away.

We're talking about ten/fifteen pounds for a lasting block, but it's rather inexpensive. I'll be bringing a cooler to make sure the dry ice block is nice and cozy until use.

Nice one, Tom.  It was in the early 80s though, and many independent drivers used dry ice due to the expense of the refrigerated trucks.  I bought 10 pounds of it, which I transported two miles in a doubled cardboard container inside a cooler.  Handled the ice and the very cold steel bearings with welders gloves (a perfect choice, since the mating bearing was placed in an over at 300 F).

Just out of curiosity, why are we not suppose to handle dry ice with our hands?  When I was a kid my mother worked as a researcher at a lab doing toxicology/environmental and occupational health science at Rutgers, she would often get supplies which were packaged in dry ice and let me and my siblings play with it when she was done.  Was I placed in dire peril?  Does this explain anything about me?

it is cold enough to cause "freezer burn" on your skin with only a second or two touching it... its kinda like not licking a flag pole in the dead of winter.