Last week I collected hibiscus flowers from Claire’s place. I layed them onto a silk scarf, which had been soda ashed. I then sprayed the scarf with a solution of copper water to which an iron solution had also been added. I then rolled up scarf & wrapped string around it and placed it in glass jar in the sun for about 16 hours.
The results were quite nice shades of green/brown where flowers had been. I will now try and attach a photo. Not sure if my iPad can do this!