Every kitchen will have onion peel waste, yet in a gastronomy context one might even be able to collect large amounts.
The peel of onions is especially good for producing plant dye. This well-known application has been used especially in the private domain. The peel’s tear strength and durability led to the following experiments. The peel was sewn together with a sewing machine and on sheets of water-soluble fibre-mats to create different kinds of mats.