HOW TO DYE WITH PLANTS

Plant dyeing took the internet by storm a few years ago and there are now countless plant dyers sharing inspiration online. There is just one problem—it’s not always as easy and straightforward as it seems…

 
Basic recipe

When I first started my adventure with natural dyes in 2015 I fell into the same trap. It took me years to realize, that like any other craft, natural dyeing has to be practiced to be mastered. It’s not only that there’s so much misinformation and frankly fake tutorials to be found. Another problem, that I am guilty of myself, was misinterpreting the information found online and drawing the wrong conclusions. It took me years to realize that some of the beliefs about natural dyeing I had were just wrong.

But this beautiful craft keeps on giving. I am still dyeing passionately 7 years in and I keep learning new things all the time. This is a post where I share some of the most basic concepts in plant dyeing. Please take this blog post as a foundation that you can build upon, not as a final recipe and all there is to it. Let’s start!

Here’s your plant dye tutorial in 5 steps

SCOUR — MORDANT — RINSE — DYE — RINSE

…and now onto explaining what it all means ;)

Fibers you can dye

Plant dyes work on natural fibers. Natural fibers are fabrics and yarns made with natural materials, for example, wool, cotton, linen, silk, etc. Synthetic fibers, on the other hand, don’t take up natural dyes well or at all.

General rule: Only natural fibers can be dyed. Fibers coming from animals (silk, wool, etc) take up the colors better than the fibers coming from plants (cotton, linen, hemp).

Natural dyes you can use

The sky is the limit… well, almost. Not all dyes are equal. If you stick to traditional dyes used for centuries, you can’t really go wrong. How to find them? In old books. And by old books, I really mean old books. Surprisingly many (utterly beautiful!) new books share very questionable dye sources. It might be deceiving when you’re first starting out. So to start with, here’s a short list of a few traditional natural dyes:
weld, madder, indigo, woad, logwood, fustic, osage, oak galls

I personally like experimenting and testing new plants. I collect them in my local park (always research toxicity before!) and test their qualities. If it wasn’t used traditionally there’s a very good chance it’s not super lightfast, but it’s still lovely to collaborate with nature this way. Here’s a short list of some of the locally foraged (or collected in my kitchen) dyes I like using, even though they’re not all equally stable:
marigolds, goldenrod, black hollyhock, chamomile, acorns, walnuts, cow parsley, tansy, avocado stones, onion skins, and tea. Check out this blog post for color references.

Remember, that dye quality is a spectrum. Dyes can’t be divided into just two categories (good vs bad). Experimentation is the key to finding what you feel comfortable with. Yet there is a group of plants that show such poor lightfastness that I personally find dyeing with to be a waste of resources (unless it’s just for fun, to entertain yourself or your kids). Here’s a short list of the plants that fade faster than I find acceptable (no matter what you do): beetroot, berries, red cabbage, black beans, turmeric

General rule: things you can eat usually don’t dye well. Just eat them instead. For super stable colors turn to traditional literature (basic colors: yellow-weld, red-madder, blue-indigo).

Preparing the fibers

Before you apply the dye, you have to prepare the fibers. The process goes like that: scour (wash), mordant, rinse.

The first thing I always do is scour the fibers. There are natural substances, as well as additives from the milling process, that protect the fibers. But they also prevent the mordant and dye from bonding with the cloth/yarn. Each kind of fiber calls for a different recipe and I won’t list them all here. I recommend Boutroup&Ellis book for recipes. For example, for cotton, I throw it in my washing machine at 90 degrees Celsius with a spoon of baking soda. For wool, I cook it in a dye pot for an hour at 60 degrees Celsius with wool detergent (cool down slowly to prevent felting!).

The second step is mordanting. Mordant is always a metal salt. There are many metals you can use: aluminum, iron, copper, chrome, etc. I work with aluminum and iron. There are some alternatives to mordants like tannins or soy milk. These substances are not mordants, though. They might improve color uptake or lightfastness in some cases, but do not create a chemical bond between the fiber and the dye. The bond they create is mechanical, which means it might be broken by rubbing or washing.

There are different kinds of aluminum salts available, each one call for a different recipe and can be used on different fibers. (Boutroup&Ellis book again or my own eBook Mordants for natural dyes). I personally, use aluminum formate. It’s a great mordant, as it works on all kinds of natural fibers and is applied cold. You can buy it online, but as far as I know, it’s only available in Germany and Israel. Prepare the solution (100g al. formate for 5L water in a lidded bucket), throw the fibers in, and let them soak for ca. 24h. Take out, squeeze the excess back into the bucket and rinse the fibers. Remember to always use gloves when working with mordants. Wear a face mask, too, if you’re working with fine powders like aluminum acetate. Aluminum formate can be stored in a lidded bucket until it’s used up.

General rule: scour your fibers by cooking them for 1h (temperature and substances according to the fiber type) and then mordant the fibers with metal salt of your choice (for example 24h hours in a cold solution of aluminum formate). Always rinse thoroughly after mordanting. Wear gloves!