Continue this rotation for 4-8 rotations of vatting and oxidizing for the darkest and most colourfast indigo blues.Ī second option is that there is too much reduction agent in the vat. Remove the fiber and oxidize it for 15 minutes, and then revat for a further 15 minutes. For the darkest indigo, you need to soak, or vat, the fiber for 15 minutes. In this case, the indigo only lays down to a certain depth of shade before the molecules start being re-reduced and removed from the fabric. The first is that you have put the fabric into the vat, and left it. If you are dyeing yarn or fabric and the fabric is refusing to go past a certain depth of shade, then there could be two possible problems. Indigo Vat Troubleshooting Two: The Fabric Color Isn’t Darkening Add an additional teaspoon of the reduction agent, and let sit for 10-15 minutes. If the vat does not change despite adjusting the pH and heating up the vat, you may need to add more reducing agent. Once your vat is at the right pH, and is the right temperature, the reduction reaction should happen very quickly. If it feels cool, then heat it up on the stove or outdoor burner, just make sure it doesn’t boil as that can damage the reduced indigo. It should be at least body-temperature or warmer. Start by checking the pH and make sure it is at 10. If your vat is blue then there is a problem. Indigo Vat Troubleshooting One: The Indigo Vat Liquid is BlueĪ reduced indigo vat should be green, with a blue to purple foam on top. Some problems with the natural fermentation vat can also be solved with these methods. These trouble shooting tips are designed for the basic reduction vat. The Saxon Blue method is detailed in Indigo, Madder, and Marigold by Trudy Van Stralen, this method should not be used anywhere near children. For an easy reduction vat with powdered indigo, or woad indigo, check out “Creating a Natural Indigo Reduction Vat.” You can also do a natural fermentation vat, or create a Saxon Blue vat. If you are new to dyeing with indigo, you can check out this article for the basic reduction vat method based off of a woad extraction. Or at least, it can ruin the vat until you know how to fix it. The procedure is simple, but what happens on the molecular level is complicated, and a single missing part can ruin the vat. Natural dyeing with indigo is both a simple, and a complicated process. The most frequent troubleshooting tactics involve the pH, or the vat temperature. There are four or five standard issues that can arise with the indigo vat. Specific epithet from Latin means used in dyeing.If you’ve dyed with indigo for any length of time, you may have come to the point of needing to do indigo vat troubleshooting. The dye indigo is obtained from this genus. Genus name comes from indigo plus Latin fero meaning to bear. Plants are still commercially grown, mostly on small farms, for those desiring natural dye, premium clothing companies, amateur gardeners, and traditional medicine. True indigo is much less in demand today for commercial dye purposes because of the creation of synthetic dyes which have now taken its place for most purposes. Flowers are followed by seed pods (to 2” long). True indigo features light green pinnate leaves (each with 4 to 7 pairs of leaflets) and short racemes of summer-blooming pink or violet flowers. Dye is obtained by fermentation of the leaves which converts the indican into the blue dye indigotin. in the 1700s where it has now naturalized in some areas. It became a cash crop in the Southeastern U.S. It is probably native to China, tropical Asia and parts of Africa, but the specific location is not entirely clear because this shrub has been in cultivation since at least 4000 BC with introduction and naturalization taking place in many places around the world before good records were kept. As suggested by the common name, this shrub was the original source of the blue dye known as indigo. Indigofera tinctoria, commonly called true indigo, is a deciduous spreading tropical shrub or subshrub of the pea family that typically grows to 2-3’ tall and as wide.
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