Earlier in March I taught a workshop for my dear friend Sue Craig and the students on her “Grow Your Own Colour” course at Plumpton College Brighton. Although I no longer lead workshops myself because of my physical limitations, I am always happy to work with Sue and her students because Sue provides all the materials and equipment and prepares everything in advance and she and her students do everything that is required as far as the hard physical work is concerned. I just sit and talk a lot and give the orders, which suits me very well!
This course was “Marvellous Madder”, which showcases the remarkable colour properties of this amazing dye plant. Last time I did this workshop I attempted too much and rather over-worked the students, so we decided to limit it to 26 wool samples this time.
We used the madder as follows:
Use about 80% madder and wash the madder pieces in cold water to remove some of the yellow and brown pigments. Then pour boiling water over the washed madder pieces and leave them to steep for about 45 seconds. Then strain this liquid into a dye pot and repeat this process twice more. This forms the first “pour-off” dye bath. (See second photo below) NOTE: I usually make this “pour-off” dye bath because it helps to use up some of the yellow and brown pigments that might not have been washed out and that can make the red colour from the main dye bath too dull or brown.
Then simmer the same madder dye pieces for about 30 minutes, strain off the dye solution and leave to cool slightly. Then add the fibres and leave them to steep for about 45 minutes to one hour. If necessary, the madder dye bath can be heated gently but keep it well below simmering point. NOTE: madder can safely be simmered to extract the dye colour but it is better to keep the temperature below simmering point after the fibres have been added, otherwise the colour may become too brown in tone. The same madder pieces can be simmered at least once more to make a further dye bath; indeed, the same madder pieces can often be re-used two or three times. So if we had had time to do this at the workshop, we could have doubled or even trebled the number of samples we achieved.
After dyeing, the samples were modified. (Instructions for making and using colour modifiers can be found in my books.)
As so often happens at workshops where time is limited, the colours achieved were not as deep and intense as I would have liked, although we did achieve a wide range of shades. Had we been able to allow the fibres to remain for longer in the dye bath, we would have had some much richer reds.
This photo shows 24 wool samples.
Each group contains a sample of no mordant, alum mordant, tannin (oak gall) mordant and rhubarb leaf base, in that order. From left to right the groups are: no modifier, acidic (vinegar) modifier, alkaline (soda ash) modifier, copper modifier, iron modifier, iron modifier followed by alkaline modifier (2 modifiers applied in succession)
These samples, also wool, were dyed in the dye liquid poured off when preparing the madder dye bath. From left to right: alum mordant, no mordant