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The workshop Dyes and dyeing was held at the 6th European Conference for chemistry teachers in Vienna 18th till 21th April 2001 by Dr. Mordechai Livneh Bar-Ilan University, ISRAEL.
Two days later these dyeing activities were modified in Lauterbach/Germany  to work with microscale materials.
What you will need
Dyes: Acid Green 50 (A), Direct Red 81 (D), Basic Red 15 (B), Indigo = Vat Blue 1 (V),  Methyl Orange = Indicator (I). MULTIFIBRE 6 (Testfabrics Inc.) vials 5 and 50 ml, tweezers, tissue paper, straw hot plate.
Experiment
Multifibre 6 (left) is cut into 5 test stripes (9 x 55 mm). Right: After 1 minute at 40° C in extremely diluted aqueous solutions of the 5 dyes and after washing in water you observe different dyeing of the 6 different fibres  (Cellulose triacetate, cotton, nylon, polyester, polyacryl, wool).
More about dyes and dyeing                                                Cotton fabric dyeing in Zimbabwe

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Copyright: Mordechai Livneh / P.Schwarz         first published:  22.04.2001........last modification:  04.01.2006