What is indigo dyeing? No. 6 "About dyeing"

By the way, I finally arrived at the story of indigo dyeing [dyeing].
The method of dyeing seems to vary depending on the dyer, but I will write it here using the method I learned.

【amount】
The amount of indigo dyeing varies depending on the size of the jar.

My 1 stone (Ichikoku: 180L) jar, which was built indigo with 1/3 bales (about 15kg) of jar, can dye about 2800g a day. Even if it is 2800g, it does not mean that the item of that weight is dyed at once.

ex.200g shirt + 260g dress = total 460g

Each item is not dyed once a day, it needs to be dyed several times.
So

ex: 460g x 6 times = 2760g

I think that.

Too little or too much is not a good condition for indigo, and too much can lead to the loss of indigo. Keep an appropriate amount and dye every other day. Proper dyeing and getting a good rest will lead to indigo health management.

【staining】
It should be well soaked in water before dyeing. After squeezing the wet product firmly and spreading it well, gently immerse the dye in the liquid so as not to make it as rough as possible. If it is rough, the dye liquor will oxidize that much. Unnecessary oxidation leads to a shorter period of dyeing, so it is necessary to distribute ki there during dyeing.
In order to dye the product evenly in the dyeing liquid, spread it well so that the dyeing liquid spreads over the entire surface while removing the air, and continue to tie it gently so that it does not come out of the liquid surface.
The time will be appropriate depending on the quality and size of the product. I won't tie it up for tens of minutes. After a suitable amount of time, gently pull it up and squeeze it close to the liquid surface so as not to roughen the dyeing liquid. Spread the squeezed material well to oxidize and color it, and then soak it in the liquid.
At the end of the day's dyeing, further oxidative color development is performed in water, and excess dyeing liquid is rinsed off to some extent.
Repeat this process until you get the color you like, but do not finish dyeing in one day, soak the dyed product in water for about half a day, then dry it in the middle (drying once during the dyeing process), and dye it again on another day. increase. This is because the color paste is better and the fastness is higher when it is dried in the middle.

[After dyeing]
After dyeing, rinse and soak in water for about half a day as described above to remove the lye to some extent. Since it cannot be completely removed by itself, use lye or a neutral detergent to remove the finished lye. Basically, it is completed here, but if you think that color fixing is necessary, soak it in salt water with the same salt concentration as seawater for half a day or more, then wash it with water and dry it. However, this does not mean that the colors will not fade at all. I haven't.

Since indigo is an adhesive dye, the finished product is slightly thicker and crispy and reliable, and it is dyed firmly without being difficult to dye on vegetable cloth such as cotton and linen like other plant dyes. increase. Depending on the type, the cloth will shrink slightly.