Rubia tinctorum & Rubia cordifolia, Garance de teinturiers et garance ?, indische Krapp u.echte Färberröte , rubia ? y rubia rota, dhá mhadar
Now I really need help with the other languages! Anyone?
I decided to try both “regular” madder and also R. cordifolia (as the latter’s cheaper). I purchased some powdered samples of both varieties and tried them on commercial yarn, mordanted with 10% alum and also with some calcium carbonate added to turn the dyebath alkaline. I couldn’t be sure of this, as the pH paper didn’t change colour, but I added more than the 6g per 100g dyestuff to make sure.
The R. tinctorum is on the left and the cordifolia on the right. From bottom to top it goes thusly: 50% wof, 100% wof, exhaust bath. The cordifolia at full strength gave what I’d call “Indian red” after seeing this tone on so many throws and other items from the sub-continent; the colours in real life are a bit deeper. The top ball was thrown into two exhaust baths, as the dusky pink wasn’t so much to my liking.
With the tinctorum, the full strength gave me what I’d expected, or near enough.
All skeins needed a fair number of rinses to get the particles out of them (it went on the garden); their individual shade was probably twice as dark when coming out of the dyebath, due to the particles sticking to the fibre, but the rinse water was only coloured by the waste particles and no waste/unattached dye.
So, will I use madder again? Not unless I buy a larger quantity from overseas to make it economically viable. When hanging the skeins to dry, the following came to mind: “Avocado skins… avocado pits… Eucalyptus sideroxylon… Eucalyptus cineria…” However, a worthwhile experiment with usable results.