Types and applications of lacquer
Purification of lacquer
Sap taken from the lacquer tree is called the Arami.
By filtration Arami and removing the garbage, it becomes a Ki-Urushi (raw lacquer).
Raw lacquer in a state in which, such as moisture and urushiol (oils) are mixed, component is uneven.
When a uniform component by stirring the raw lacquer, gloss will appear on the lacquer surface. This stirring is called "Nayashi".
Further stirred while heating to around 40 °, to remove the water content of about 30% contained in the raw lacquer to 5% or less.
As a result, it becomes semi-transparent state of brown. This work called "Kurome".
Through the above work, the lacquer have high transparency and viscosity is "Kurome-Urushi".
It is generally called "Kijiro-Urushi".
After this, mixing such as oil and ore in Kurome-Urushi, it is made a lacquer suitable for a variety of lacquer painting process.
1.Ki-Urushi (raw lacquer)
There are Kijomi-Urushi and Suriyou-Urushi and Shitajiyou-Urushi and Seshime-Urushi in the Ki-Urushi, and they are used for techniques of Suri, Fuki, Shitaji (foundation).
2.Suki-Urushi (transparent lacquer)
Painting on wooden base you will get brown finish with a little clarity.
It is also possible to be colored if you mix the pigment or dye in it.
It is the lacquer in order to give a transparency and a gloss of the coating film by adding dry fat.
By kneading the colored powder, it is suitable to make the color lacquer, used for colorful lacquer paintings.
Lacquer to that increase the transparency by mixing such as perilla oil.
It is used as an intermediate when you repaint.
This lacquer is, issued a yellow tinge to put the yellow ore to Kurome-Urushi, it is oil-free.
To draw such as a background primarily by the Maki-e, it is used in the process of rub the flour.
Origin of its name is similar to the skin of pear.
This is used in the process to put a foil.
This has been adjusted to be smoother than Syuai-Urushi.
3.Kuro-Urushi (black lacquer)
Adding iron sulfide in Kurome-Urushi, it is made by dying black.