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Glass Stirring Rods: Cut and Flame-Polished
A laboratory stirring rod is a piece of solid glass, usually borosilicate, about half a centimetre thick and 10 to 40 cm long, with rounded ends. Rods are cut from a single long length of thin glass rod, and the ends are rounded, for example by flame polishing, so they cannot scratch the glassware: a scratched beaker or flask may crack when it is later heated. In flame polishing the glass surface melts briefly and surface tension pulls it smooth.
Olùbẹ̀rẹ̀
30 minutes
Ìlànà
1
1
Cut to length
Cut to length
Cut the long glass rod into pieces 10 to 40 cm long.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ọ̀pá Gíláàsì Borosilicate1 as required2
2
Flame-polish the ends
Flame-polish the ends
Hold each end in the torch flame until the surface melts briefly and surface tension rounds it smooth. Let the rods cool.
Àwọn irinṣẹ́ tí a nílò:
Ọ̀gọ̀ ìfẹ́ dígí orí tábìlìÀwọn ohun-èlò
1- 1 as requiredÀyè
Àwọn irinṣẹ́ tó nílò
1Ìtọ́nisọ́nà yìí ń ṣe
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