When it comes to natural dyeing, the skins of the yellow onion produce beautiful ranges of soft yellow to rich gold and all shades in between. Similar to avocado stones the skins are high in tannin and because of this, the colour will bind to the fabric without the addition of a mordant. A mordant helps the colour bind to your fibre while increasing colour & light fastness. Yellow onion skins are a great natural dye to start with as they are inexpensive, easy to collect & and release their colour quite quickly. They also make a great dye if you’re looking for a fun project to do with kids.
In gathering your onion skins, be sure to store them in a bowl or brown paper bag until you have saved enough. Don’t store them in a plastic or airtight container as they will sweat, start to stink & develop mouldy. Also don’t mix the red onion skins in with the yellow. Red onion skins give shades of brown which will muddy the rich yellow hues of the yellow onion. The number of skins you use will determine the depth of shade you will be able to achieve. You can get a good-strength dye from a minimum of 15 onions, the more you use the stronger your colour will be.
Before starting you will need something to naturally dye, I always recommend an old t-shirt, small pieces of fabric, napkins or tea towels to begin. Before you make your dye, you have to clean your fibres. We do this using a method known as “scouring” which removes any residual impurities, waxes or oils. For a simple ‘scouring’ method pre-wash your items (on whatever cycle you would normally choose) in your washing machine using 1 tbsp (per item) of soda crystals or washing soda.
You will need:
- Heat source
- Wooden Spoon
- Something to dye
- Onion skins (a minimum of 10)
- A big pot (large enough to hold whatever you’re dyeing)
- Container or basin filled with water
How to make the dye & dye your fibre:
- Wash your fibre with 1 tbsp of any of soda crystals do not use detergent then soak it in a basin of water while you prepare your dye.
- Fill your pot 3/4 with water & add your onion skins.
- Bring to a boil, then immediately reduce to a low simmer.
- Gently simmer the dye for at least 1 hour. Once the water has changed colour and the dye has been extracted, use the strainer to remove the onion skins.
- Take your fibre from the basin, squeeze out the excess water then submerge it completely in the dye bath.
- Simmer on the lowest heat for a minimum of 30 minutes, stirring frequently.
- When you are happy with the colour, turn off the heat, let the dye bath cool then remove your fibre.
- If you want darker colours, leave your piece soaking in the pot overnight. If you want softer pale shades, remove your item once you have the shade you like.
- Wash with an eco-friendly gentle detergent on a normal cycle and hang to dry. Enjoy your new naturally dyed piece.
Let me know if you have any experience extracting dye from onion skins or if you plan to give it a go. I hope you find this useful & best of luck with your experiments. x Kathryn