I had the brainwave of seeing if I could do some natural dyeing with them while they boiled.
I looked on the internet and couldn't find any information - maybe I'm just not a good researcher.
I tried what I had done previously with the eucalyptus bark, just plonk some fabric in and see what happens. Very scientific.
After about 24 hours - I was busy doing other things - I drained the olives out, collected the dye bath in case I can do something else with it, and rinsed out the fabric.
As I suspected, the polyester did not colour very much at all, it is now a pinkish white.
The two pictures are with flash and without flash, showing the different intensities of the colours on different fabrics.The silk took the colour quite well and the velvet has two different colours, so part is silk and the other part may be viscose. Strangely enough, there is a slight greenish tint to the nap of the velvet - olive green perhaps?
I have washed them with detergent and they seem to have retained the colour. I am not sure if it will be colourfast though. I will have to do more research.
I am hoping to use the dyebath and see if using mordants will make much difference.
Ahh, holidays, time to play.