Colourful Cochineal Eco Print

It never ceases to amaze me what treasures that ‘Mother’ nature has up her sleeves! As I fall deeper into that obsession of dyeing and printing with natural materials I discover even more wonderment! Combining some pre-dyeing with eco printing leads to a colour explosion. Let me introduce you to Colourful Cochineal Eco Printing!

It always amazing me how I get drawn it… On a recent trip to a small shop with all kinds of fibre and dyeing goodies I went berserk! I was on a mission to get some indigo (more on that soon) but I found something else; small little bugs!

What the heck is Cochineal?!

Cochineal is a tiny tropical scale insect which creates natural carmine dye. Amazingly, there it was, a little container of dried tiny tiny bugs. And according to the knowledgable fellow it is an amazing dye that gives great colour. I was quite intrigued!

Cochineal is known to give much colour for the small amount of material. As little as 3% of the weight of fibre that you are dyeing can give good colour (calculate weight of material against weight of cochineal) 10-20% will give string colour.

How to use Cochineal

The little dry carcasses (don’t worry, you can’t really see any arms and legs) can be ground up either in a mortar and pestle or a coffee grinder as this is a food safe anyway.

It grinds quite small so it can be used as is or strained out of the water. I have tried both methods with success. I use a scrap of organza as a fine mesh strainer similar to making tea.

Once the dye water has been made I add my silk fabric to the pot and slowly bring it to a low simmer. Heat can kill the colour so I’d rather bring it to a low simmer gradually. I hold the heat for about an hour and then let it sit and cool over night to set even more colour.

Lovely strong pink! Note the dark specks? Those are the residue of ground cochineal. They may give some darker spots so you may want to strain the dye-water. I am not too concerned with perfect even colour.

The Bundling

I rely on my favourite leaves to print; sumac and maple. These were used fresh however dried can also work. As stated in the introduction you will need something to wrap the layers around.

Lay the silk flat and place the leaves. The fronts and back print differently so vary the pattern as you like. This method does not dip the leaves in iron water.

The key is to have everything as smooth and flat as possible for defined prints.

Rather than soaking/dipping the leaves in an iron-water solution I use an iron blanket here. Old cotton sheets ripped into strips are soaked in a weak iron-water and wrung out well. This way the iron comes into contact around the leaves rather than on them. It is then carefully laid over the leaves.

As a barrier to stop bleed-through another layer of plastic is placed above the iron blanket. (strips cut from drop sheet plastic can be tailored to the right width) Flatten and smooth before rolling tightly.

The bundles are then wrapped with string and ready for the pot.

Be aware that this instruction shows how it has worked great for me however results may vary according to many factors. The iron-water strength, the leaves, the fabric, the water PH, all play some role in the final outcome. But that is what makes it interesting! It truly is ONE OF A KIND!

The Eco Print Processing

I prefer to steam my bundles as then there is less water and also less darkening at the ends of the rolls. These have been steamed outside on a BBQ side burner in an aluminum lidded roaster. Make sure to check that the water does not disappear! I steam for about 2 hours. I can usually start to smell some odd aroma from the leaves ‘cooking’.

When I unrolled my first Cochineal dyed piece I almost lost my mind with the amazing colours! I was hooked even more now! I can barely keep up with buying silk…

To allow a bit longer chance of picking up colour I sometimes place the steamed rolls in a blanket as they will hold the heat and ‘process’ even longer. Once cool they can be unrolled.

Go ahead… Do a ‘happy dance’! I am sure that I did! As an artist who has painted for so many years of my career this just astonished me so much. The variation of the pinks and purples and reds! I believe (no chemistry degree here) that it is all about the acid and alkali reacting with the dye. Many reds change according to acidity as seen with red cabbage. Cochineal however is not fugitive and has great lasting ability.

Once dried and ironed I can’t seem to stop looking at it…

…or taking pictures!

Oh, by the way, my apologies to the little cochineal fellows (actually it’s the females, figures)! Take comfort in the fact that your ‘colour’ shines on for many years to come and we will be in constant awe of your amazing abilities! Thank you!

And thank you to my readers for joining me…

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130 Comments

  1. I have a question about using cochineal. I am an eco printer where I mordant my paper with alum, cover with flowers and leaves, then steam them with great results, but how to I incorporate cochineal. When in the process?

  2. Love your wonderful work and can’t wait give it a try, what type of silk do you use?
    I hope you can let me know, thank you.

  3. Che meraviglia
    Ho appreso molto .
    Vorrei sapere se il pezzo colorato .va messo umido o secco .
    Grazieeeeee
    Grazie x tt I consigli

    1. ‘Wonderful
      I learned a lot. I would like to know if the colored piece should be placed wet or dry.Thanks for all the advice’
      Yes, the fabrics need the moisture to transfer the colour from the foliage. Making some tests is a good idea to get the amount of moisture right.

  4. Hola, me encanta!! Gracias por compartir tan desinteresadamente tus conocimientos! Lo haces tan fácil de comprender!