Non-mordant dyeing - PEP BB textile.straw.dye.no

This is a badge bit (BB) that is part of the PEP curriculum.  Completing this BB is part of getting the straw badge in Textiles.

For this BB, you will dye two pounds of natural cloth, yarn, or fiber using a no-mordant dyeing method.

Opalyn Rose collated some dyestuff information here on permies.

To complete this BB, the minimum requirements are:
  - dye two pounds of cotton, wool, silk, or linen - cloth, yarn, or fiber
  - use dye from natural sources including rhubarb leaves, stinging nettles, arbutus bark, or avocado pits
  - prepare the fabric, yarn, or fiber for dyeing - clean and organized
  - test for dye fastness - warm wash with soap and something white after it’s dyed to see if the white is still white and the color is still there
  - write a few words about the choice of dyestuff and why it doesn’t need a mordant

To document your completion of the BB, provide proof of the following as pictures or a video (less than two minutes):
 - describe what dyestuff and what type of cloth, yarn, or fiber you used
 - your material (perhaps on a scale) before dyeing
 - a process picture of dyeing
 - your finished cloth, yarn, or fiber and the white (after washing) cloth to test dye fastness