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Glass Sample Vials: Tubing Closed Flat, with a Lip and a Cork
A vial is a small glass tube closed at one end, usually with a flat bottom where a test tube has a round one. A lip vial is closed with a cork. Work wide glass tubing in the flame as for test tubes, flatten the closed end on the marver, turn out a lip and fit a cork.
The picture: a small old glass vial with its cork.
Intermediate
An afternoon
Instructions
1
1
Draw off and close
Draw off and close
Heat the tubing in the flame while turning it until it softens through, then pull the ends apart to close it, as for test tubes. Melt the closed end until the glass gathers evenly.
Materials for this step:
Glass Tubing Kit1 pieceTools needed:
Bunsen Burner
Heat-Resistant Gloves
Safety Glasses2
2
Flatten the bottom
Flatten the bottom
While the closed end is soft, press it straight down on the marver so it sets flat and the vial stands (our step).
Tools needed:
Bunsen Burner
MarverHeat-Resistant Gloves3
3
Cut and turn the lip
Cut and turn the lip
Score the tube at the vial's length with a file and snap it. Heat the open end and roll out a small lip so a cork seats firmly.
Tools needed:
Metal FileBunsen BurnerSafety Glasses4
4
Anneal and cork
Anneal and cork
Let the vial cool slowly in the edge of the flame, then trim a cork to fit the mouth.
Materials for this step:
Corks1 pieceTools needed:
Bunsen Burner
Utility Knife
Cork Borer5
5
Tube size for 50 ml
Tube size for 50 ml
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