Describe different stages of the production of indigo
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Production of indigo:
(i) After the harvest, the indigo plant was taken to the vats in the indigo factory. Three or four vats were needed to manufacture the dye. Each vat had a separate function.
(ii) The leaves stripped off the indigo plant were first soaked in warm water in a vat, also known as fermenting or steeper vat, for several hours.
(iii) When the plants fermented, the liquid began to boil and bubble. Now the rotten leaves were taken out and the liquid drained into another vat that was placed just below the first vat.
(iv) In the second vat, also known as the beater vat, the solution was continuously stirred and beaten with paddles. When the liquid gradually turned green and then blue, lime water was added to the vat. Gradually the indigo separated out in flakes, a muddy sediment settled at the bottom of the vat and a clear liquid rose to the surface.
(v) This liquid was drained off and the sediment, i.e. indigo pulp transferred to another vat, also known as the settling vat, and then pressed and dried for sale.
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Plant extraction of indigo necessitates various stages because the color themselves does not truly subsist in the environment. The substance detected in plant sheets is a forerunner to indigo. The antiquated process to extricate from plant leaves and transform it to indigo has survived unaltered for ages. In this manner, a group of tanks is designed in a step wise method. The upper-most container is a dissolving container into which the freshly cut flowers are located. A ferment known as indimulsin is attached to hydrolyze, or crumble down, the indican into indoxyl and glucose. During this method, carbon dioxide is given off and the stock in the container turns a dingy yellow.
The resultant composite is refined to exclude contaminants and analyzed to produce a thick adhesive. In this manner, the plant is connected with grain husk particles, limestone scraps, lye ash, and sake. The disease is assumed to work for about one week to compose the dye orpiment which is named as Sukuma.