Natural Dyeing/Solar Dyeing Buckthorn Bark Dye Posted on October 21, 2016 / 0 Comment This is Buckthorn bark on cotton canvas, raw silk and hemp — dyed in a plastic bucket using the solar dye method of letting it sit in the sun. I love these colors! SHARE THIS POST buckthorn bark, buckthorn dye, natural dyeing, plant dyes, solar dyeing