11-22-2006, 12:01 PM
Join Date: Apr 2005
Location: Brentwood, CA, USA
iTrader Positive Rating: 100%
My drop checker fluid goes to blue green overnight, then back to green in a couple of hours with the CO2 on. I was a little surprised at how little of the CO2 is lost overnight too.
fredyk: I don't think a gas range will be enough heat, concentrated enough to allow you to bend a glass test tube. If you try it, don't put anything in the tube, like sand, or it will make it much harder to heat up the area hot enough, and it will tend to imbed into the glass. The way real glass blowers do it is to slowly push the ends of the tube to shorten the test tube, thickening the glass where it is to be bent, then very gently blow into the tube as you bend it. That is a lot easier with a longer tube, of course. If you try this, be very careful!!