Tag Archives: indigo

Indigo

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Indigo is probably the most familiar dye in the world and has a long history of use. The first identified use is from 4000 years ago in Peru. Our word indigo, however, comes from a Greek root word meaning Indian dye since it was from India that indigo traveled to Europe via the Silk Road. The use of the dye quickly spread. From the Tuaregs in the Sahara to Cameroon, clothing dyed with indigo signified wealth.

Prior to the arrival of indigo in Europe, woad was the tradition dye. It produces a lighter blue. (One of the theories is that blue previously meant a shade similar to cyan.) In the New World, enslaved people were put to work cultivating indigo which became a significant cash crop. There were large plantations in South Carolina. (See Death of a Dyer.)

During the time of Will Rees, all of the yarn he worked with would have been dyed with these natural dyes. Indigo, by the way, was very expensive.

Indigo is not water soluable and so has to be treated to make it useable. One of the pre-industrial processes  was  soaking it in stale urine. Many accounts do not mention this particular fact but the pungency of the process is regularly described. (I used indigo a library program and when it was ‘curing’, it smelled so terrible, we all left the room.) The result is known as indigo white. Fabric dyed in the indigo white turns blue with oxidation. Indigo is also toxic so there is plenty of opportunity for indigo workers to become sick. And despite the processing, indigo fades slowly over time. Just take a look at your jeans. Denim is dyed with indigo and fades.

I saw items dyes with indigo in the highlands of Peru. The hanks of wool were all different colors from a light royal blue to such a deep blue it was almost navy. Truly beautiful colors.

Synthetic dyes have now almost taken over for indigo and the other natural dyes.

Dyes in Bronze Age Crete

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Since handweaving is one of my hobbies, or was until my books took off and I no longer had time, I am fascinated by ancient textiles. Until modern times, and the Industrial Revolution when looms and weaving became mechanized, weaving was one of the most important professions. In Egypt, some of the hieroglyphics inscribed on walls show weavers. And loom weights have been found in Akrotiri, buried in ash when the volcano that blew the center out of Santorini and severely weakened the Minoan civilization erupted.

Working in tandem with the weavers were the dyers. Of course, until the 1880s when the synthetic dyes were invented, all the dyes were natural dyes. The women of Bronze Age Crete used dyes to create their elaborate and colorful patterned textiles.

The Cup Bearer

Notice the colorful stripes on the figures loincloth in the restored fresco from Knossos.

The camp stool fresco

What were the dyes they used? Yellow from saffron. (A famous fresco depicts a group of young girls collecting saffron from crocuses. Yellow was the color of the young girl.) Blue from indigo. Red from the cochineal beetle. And, perhaps most interested and valuable, purple from the shell of the murex sea snail. Thousands and thousands of shells have been found, speaking to a large operation. Because so many shells were needed to make the dye, purple was very expensive. Hence the name, royal purple. It was too expensive for the common folk, right up through the Middle Ages.

Where is green? Although green is all around us in nature, it is a very hard color to find as a dye. Using green plants does not usually give a green color and if it does, the color is not permanent.

Green usually has been made by dyeing blue and overdyeing yellow. When it was discovered by the painters, green contained arsenic. Napoleon is supposed to have died from arsenic poisoning from the fumes coming off his wallpaper.

Dyeing with indigo

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sweater-indigo

I’ll return to looms next blog. But I wanted to post about the indigo dyed sweater. Indigo loses strength with repeated dyeing I like the marbled effect but if one dyes the fiber in successive batches, as I did, the later skeins of yarn are lighter. See the sleeve? Still a few bits of darker dye, but overall the color is a lot less intense. Just FYI for all the dyers out there.

To Dye for – Indigo

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Indigo is probably the most familiar dye in the world and has a long history of use. It is thought that India was the first place indigo dyeing began use of the dye quickly spread. From the Tuaregs in the Sahara to Cameroon, clothing dyed with indigo signified wealth.

In the United States, of course, indigo gave the characteristic blue to denim (although most of the dye now used is synthetic.) Woad also yields a blue dye (yes, the same woad used by the Celts) but it is not usually as deep a blue.  Asian indigo, Indigofera sumitrana, yields true indigo.

Indigo is not water soluable and so has to be treated to make it useable. One of the pre-industrial processes  was  soaking it in stale urine. Many accounts do not mention this particular fact but the pungency of the process is regularly described. The result is known as indigo white. Fabric dyed in the indigo white turns blue with oxidation. Indigo is also toxic so there is plenty of opportunity for indigo workers t become sick. And despite the processing, indigo fades slowly over time.

I saw items dyes with indigo in the highlands of Peru. The hanks of wool were all different colors from a light royal blue to such a deep blue it was almost navy.

During the Colonial period, there were indigo plantations in South Carolina. Three harvests, the last in early December, was the goal and contemporary accounts describe both the pungency of the smell and the toll the harvests took upon the slaves. Indigo was synthesized in the late 1890’s and within twenty years or so had almost completely replaced the natural substance.