After dying the bacterial cellulose with food dye and Butterfly Pea Flower Tea I was hoping to see if a high grade Matcha (green tea) could have a similar effect.
My past experiment make me believe caffeine is good for fermentation. I noticed adding some coffee powder actually helps. I was surprised the the cellulose turned wait not green.
I think it would be best to try again with a little "scoby mother" and see if the pellicle actual changes color.
I left it drying October 20, will report back as soon as it dries
Fully dry sheet.