Onion-Skin Dye

As the Story Goes

Of all the natural dyes, onion skins may be the most quietly practical — a dye that cost a household nothing, since it was made entirely from a kitchen scrap that would otherwise have been thrown away. While dyes like madder or indigo required cultivating or trading for a specific plant, onion skins simply accumulated in the kitchen every time a cook peeled an onion for supper, and a resourceful household learned early on not to waste them.

The papery outer skins — yellow, red, or a mix of both — were saved in a jar or a cloth bag until there were enough to make a proper dye bath. Wool was the fiber most commonly colored this way, since it takes dye more readily than plant fibers like cotton or linen, and the resulting shades ranged from a soft gold to a deep burnished orange or rust, depending on how many skins were used and how long the fiber sat in the bath.

The tradition carries on today in a very specific, well-known form: onion-skin dyeing of Easter eggs, a custom especially strong in Eastern European households, where eggs wrapped in onion skins and boiled would emerge a rich mahogany brown or deep red-gold, often with the pressed pattern of a leaf left behind where it had been tied against the shell. It’s one of the few natural-dye traditions that never really faded from everyday practice, likely because it required so little — just skins that were already being saved anyway, and an egg that was going to be boiled regardless.

Onion-Skin Dye

A simple dye bath using saved onion skins — good for wool yarn or fabric, or for dyeing eggs the traditional way.

You’ll need:

  • 2 to 3 cups onion skins (yellow, red, or a mix), loosely packed and saved over time
  • Water, enough to cover your fiber generously
  • Fiber to dye — wool yarn, wool fabric, or silk take onion-skin dye best
  • A large pot used only for dyeing, not food (unless you’re specifically dyeing eggs)
  • A mordant such as alum, if you want the color to be more colorfast (see note below)

To make it:

  1. Place the onion skins in the pot and cover with water.
  2. Bring to a simmer and let the skins steep for 30 to 45 minutes, until the water turns a deep gold or amber.
  3. Strain out the skins, leaving just the dye bath behind.
  4. Add your dampened fiber to the pot and simmer gently for 20 to 40 minutes, checking the color periodically — the longer it sits, the deeper the shade.
  5. Once you’re happy with the color, remove the fiber and let it cool, then rinse in water of a similar temperature until it runs clear.
  6. Hang to dry away from direct sun.

To use it for dyeing eggs: Wrap hard-boiled or raw eggs snugly in onion skins, securing them with a scrap of old pantyhose or cheesecloth tied tightly, then boil as usual. The skins will color the shell as the egg cooks, and pressing a small leaf or flower against the shell before wrapping will leave its pattern behind in the dye.

A note on mordanting: fiber dyed without a mordant will take a lovely color, but it will fade with washing and light over time — which was often perfectly acceptable for a household using a free, endlessly renewable dye source. If you’d like the color to hold longer, soak your fiber in an alum-water solution before dyeing; this is covered in more detail in Preparing Fabric for Natural Dyeing, elsewhere in this pillar.

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