A flat brush is a working tool within other crafts. Tokyo’s Edo hake reference groups brushes for lacquer, mounting, printing and other uses, but its construction account does not give all seven types the same way of holding their hair.
Technique and structure
The technical description separates the lacquer brush from the other six types. For a lacquer brush, nori-urushi consolidates the hair and the hair boards are stacked tightly together. For the other listed brushes, a metal comb mixes the hair; heat straightening and rubbing with rice-husk ash prepare animal hair; silk thread or wire binds the assembly using a tightening tool. Material selection, preparation and fastening are therefore separate questions. A photograph of the working edge alone does not identify how the hair is retained inside the tool.
Start with the intended work
The reference names human hair, animal hair and plant fibres among the materials, with hinoki, bamboo or equivalent handle woods. It connects material choice with use rather than assigning one universal hair to every brush.
For a workshop enquiry, specify the task first, then ask about the hair and its retention. This is a construction guide, not a demonstration of a particular brush’s application quality.
For international readers
Confirm the intended coating or craft operation with the maker. The traditional material list does not establish solvent compatibility or a cleaning method for an unidentified brush.
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日本語
江戸刷毛：毛の下ごしらえと固定方法を読む
東京都の江戸刷毛資料は、漆刷毛と、それ以外の六種で毛の固定工程を分けています。漆刷毛は糊うるしで毛を固め、毛板を密着させます。他の刷毛では混毛、火のし・毛揉み、絹糸や針金によるとじを記載。毛の材質だけでなく、下ごしらえと固定方法を用途に合わせて読むための解説です。