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Extraction of food colourings and direct dyeing /
Extraction of food colourings and direct dyeing

Extraction of food colourings and direct dyeing

LC5.4.2.1

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Description

The students isolate the food dye of coloured chocolate lentils and then dye wool fibres with it using the direct dyeing method. They recognise that protein fibres such as wool are suitable for the ionic direct dyeing process because of their functional groups.

Components of equipment sets

1	6700400 4	Acetone, 250 ml Danger H225 H319 EUH066 H336
1	667027 4	Tweezers, blunt, 130 mm
1	6659531 4	Dropping pipette 150 mm x 7 mm Ø
1	6659541 8	Dropper bulb
2	602022 4	Beaker Boro 3.3, 100 ml, squat
1	664183 4	Petri dish, 100 x 20 mm, glass
1	6719550 4	Acetic acid, dil., approx. 2 mol/l, 500 ml Warning H315 H319 H290
1	610010 8	Laboratory safety goggles

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Extraction of food colourings and direct dyeing

Description

Components of equipment sets

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