I posted recently about solar dying wool with mulberries and I thought I’d now have a go dying some commercially spun cotton that I have already, and conveniently, put up into hanks. There are six 50g hanks, so I am hoping for 300g of lovely coloured cotton to play with.

I don’t dye cotton often, but I do know that it requires tannin as a mordant. Well, being a bit disorganized, if I’ve got any commercial tannin mordant I can’t find, so it was a relief when after a quick look in Jenny Dean’s Colours from Nature, I found that bramble leaves and twigs contain tannin. A bit more research on the internet suggests that mulberry leaves also contain tannin. It looks like this is going to be a multi-day effort.

DAY 1

One thing we have in plenty in the garden and surrounding fields is brambles and of course we have a mulberry tree, so I went on a little foraging trip. I collected a basket full of mulberry leaves and brambles which I chopped up and boiled for an hour as instructed in the book.

DAY 2

I left these to soak overnight and have just strained the liquor off into a pan and slightly reheated this.

I’ve just submerged the damp cotton hanks in the tannin liquid, and will leave this for 24 hours for the cotton to absorb the tannin. According to Jenny Dean there is a likelihood this will stain my white cotton and is bleached white slightly yellow, so we will see.

Hopefully the mulberry dye will accommodate this and give me a nice color.

DAY 3

After the tannin soak the cotton had taken on a slight creamy colour, not too bad at all. Maybe it didn’t take the tannin?

I had prepared 1.5kg of mushy mulberries that weren’t really edible by cooking them up in some water and leaving them to soak and give up their colour overnight. I thought I was ready to get in with the dyeing, but luckily at this point I went back to Jenny’s book. Only then did I  realised that the cotton needed to be soaked in an alum mordant after the tannin. How did I miss this before?

The recommended amount is 4 tsp alum and 1.5 tsp of washing soda per 100g of fibre. Dissolve the alum and soda in enough water to cover the fibre,  and bring to a simmer. Then leave it to soak and cool for 12-24 hours.

DAY 4

This afternoon I took the yarn out and rinsed it. Then strained the mulberry liqour and put it in the old slow cooker I use for dyeing. I added some salt (not sure why but seemed to remember it helps the dye take) and then added enough water so that the liquid would cover the fibre. After that I immersed the yarn in the dye.

Fingers crossed it will work.

Well, the hanks came out looking lovely, but as predicted, the colour mostly washed out. It’s not a bad colour, it’s very a pale, lilacy grey, just not the pink I hoped for.