3. Heating Multifibre 6
marked with the black CD-R Pen
.
.
.
Materials
Fabrics from Multifibre 6 (MF6),
TDK CD-R PEN, Infusion bottle 50 mL, water, burner:
stove with a candle (see fuels and burners),
scissors...
Experiment
1. Take the six fabrics labeled
1 - 6 with a TDK CD-R PEN (Fig. 1).
2. Transfer them into an
infusion bottle with water to be heated (Fig. 2).
3. Boil for 1 hour (Fig.
3), cut off the upper part of the MF6 (Fig. 4).
4. Replace the water by fresh
water and boil the lower part of the MF6 for another hour.
5. Dry the MF6, fix the two
parts of it on cardboard like seen in Fig. 4.
Observations
The water and 4 of the six fabrics
are dyed red, the water shows a fluorescent reddish colour.
Explanation
The black colour contains a fluorescent
redish substance that is soluble in water (see
next experiment).
This substance is adsorbed by AC,
Ny, PA and W but not by C and by PE.
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modification: 22.02.2006