Materials :
-
Used oil/ Leftover oil
-
Hardening agent
-
Aromatic oils
-
Aluminium paper/ aluminium tins
-
Candle wicks
-
Crayons
-
Beaker
-
Bunsen burner
-
Tripod stand
Procedure:
1.
Heat up the oil in a beaker on a tripod stand
using a Bunsen burner. Once there are bubbles formed in the oil, remove the
tripod stand with the beaker on it; and switch off the Bunsen burner. Make sure
the flame of the Bunsen burner is blue in colour.
2.
Then, put in some hardening agent and mix it
well while it is still hot, to make sure the hardening agent dissolves in the
oil properly.
3.
Put in the aromatic oil.
4.
Cut/shave the crayons, before putting the
shavings and cuttings into the oil.
5.
Once the beaker with the oil is cooled, put it
into an aluminium tin and mix it again. You will see that the crayon’s colour
is added to the mixture. Once it is semi-hardened, pop in a wick.
6.
Put the aluminium tin filled with the coloured
oil into a refrigerator so that it will harden faster.
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