maori cloaks Flashcards
1
Q
hinau bark
A
black colour,
Large tannin molecules break down/hydrolyse when boiled. Get yellow colour
Tannic acid; black colour develops over time in sun/mud
Fe+ from mud charge transfer.
2
Q
tanekaha
A
red colour oxidation reaction, Oxidation reaction
Add wood ash to develop red/brown colour
3
Q
reurekau bark
A
more than one colour, Mordine > morindone (pH sensitive, yellow in acid)
