Topic: Natural Dyeing
Mordanting Cotton First we’ll deal with mordanting cotton because the options are limited. Usually cotton is mordanted with alum. Sometimes iron is used to create darker, sadder colors. Care has to be taken with iron since too much can cause the fiber to deteriorate. Most dyers feel both alum and iron are safe mordants—but like any powder to do with dyeing you do not want to inhale it, injest it, or get it on your skin. Painting stores have relatively cheap air filter masks used by house painters. Sometimes I just use a medical dust mask, but I really like the air filter one better.
There are two methods for mordanting cotton: (1)the alum acetate method and (2)the alum sulfate (normal dyers alum) and tannic acid method. Alum acetate is a more expensive alum that is only available from speciality suppliers. I prefer it to the alum tannic acid method which is cheaper but multiple step and takes significantly longer. For alum acetate, use 5% WOG or 4 Tablespoons for 1 pound. Use 1/3 cup for 1.5 pound. Dissolve alum acetate in boiling water. Hold at 100 degrees for at least one hour and longer will not hurt it. Drain water (do not rinse). Either keep goods in plastic if going to dye right away or dry and use it later. If dry, soak in water before dyeing.
Only a portion of the alum will be soaked up by the goods. If you want to mordant more goods, just put in ½ as much mordant. After 2-3 uses, go back to the full amount of mordant and start again but you can continue to use the same water.
Another option is a 3 step mordanting process using potassium alum sulfate (common dyers alum) and tannic acid. To do this mix ½ cup alum sulfate in 4 gallons of hot water in a plastic bucket. Make a tannic acid solution by dissolving 2 tablespoons in 4 gallons of hot water and put in a separate bucket. Put scoured wet cotton fabric or yarn in the alum sulfate mixture for 12-24 hours, then rinse. Then put fabric in tannic acid solution for 12-24 hours. Rinse again. Put back in alum solution for 12-24 hours. You can reuse these alum and tannic acid mixtures several times. Sumac is a source of tannic acid.
I've had lots of fun teaching quilters to natural dye. Quilting is something I wish I had the time for but that yarn and fleece calls me too much. The fabric above or some like it, is headed to a patchwork lining on my natural colored circular sampler bag. Now if I can just figure out what sort of interfacing to apply and how to make a bag lining, I'll be set. I sure wish I'd paid more attention when Mom tried to teach me to sew. Linda
Updated: Thursday, 5 June 2008 10:03 AM MDT
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I love to dye with the fruit wood, leaves, and twigs. Most of these don't need mordant because the tannins in the bark serve as a mordant. These yarns were dyed in June 2006 from leaves, twigs, and immature fruit. I had one of those small plastic grocery bags full and got some wonderful colors. This was quite a lot of color from this amount of plant material. I have about 16 ounces here. The most reddish ones were the first dye bath and were on unmordanted fiber. This probably was because the amount of dye in the water was the most. I want to experiment some more this year with this dye although I have gotten quite lovely colors last year from plum leaves and twigs. What I need is a nearby friend with a big crab apple tree in their yard. My crab apple tree is just a baby so I can't just pull off a lot of leaves and bark there yet.--
Milkweed pictured in my last post is a persistent weed around here. It is easy to see because it is taller than everything else in the field. Almost any vacant lot in my town has some and along irrigation ditches it flourishes. To use it, I pick the whole plant wearing gardening gloves. I have heard it may cause a contact dermatitis in some people so have played it safe. I have dyed with a lot of it and like the clear yellows it gives. The sample on the left is alum and the right tin. As well as using it as yellow, I over dye with light concentrations of indigo or cochineal and get lovely greens or oranges. Keep in mind that in all dyeing (even chemical dyeing) yellow is a very wimpy color easily overrun by any other color. When I took the class with Trudy Van Stralen (a once in a lifetime opportunity) she suggested dyeing with your yellows first for at least 1/2 hour and then dyeing with the light concentration of dyestuff. So that is my procedure.
I finally went to the doctor 2 days ago because I knew I was really sick when I went to my favorite gardening store and could barely walk around picking out plants. Usually I'm a gardening nutso this time of year. Our weather which has been cool held me back for a while. But it was knock down gorgeous. So I have bronchitis which makes me very sleepy. But I still bought lots of garden plants yesterday and am going to hit the beds in a few minutes. My daughter is coming over. Right now I just have a big mess on my front porch. One of my favorite things about gardening is natural dyeing. Usually I go through a massive natural dyeing phase in June when milk weed starts to bloom. It is one of my favorite local dye plants. I have to get gardening so I can get dyeing. Linda
Okay I admit it. My learning curve on posting photos is long. Sometimes I make them tiny like the purple clover scarf and sometimes giant. Haven't really figured out how it works and just poke and hope. Linda
I'm finally posting some pictures of recent finished objects. This scarf is a knitted lace pattern of only 5 stitches and 3 rows. This makes it reversible, so it should be dead simple. Not exactly. It is a pattern every row (no reassuring purl or knit across). I didn't make many mistakes knitting it which was good because I had a little trouble seeing how to go back. I'd put in an occasional life line when I do it again. Didn't really need it until I put one in before I put the edging on but somehow I knocked the needles out and lots of other silly stuff and that life line came in handy. I knit this in Alpaca with a Twist Fino. I really like this yarn and bought some more recently when it was on sale at my lys. I have another version of this scarf too, I'll post. I'm teaching a class on this scarf in August at Wild Purls. Linda