Solid ink (ink stick) used in calligraphy and painting, or the black ink produced by grinding it on an inkstone.
書道の授業で、硯に墨をおろして半紙に文字を書いた。
In the calligraphy class, I ground the ink on the inkstone and wrote characters on washi paper.
古い墨はしっかり乾かしてから保管したほうが長持ちする。
Old ink sticks should be thoroughly dried before storage so they last longer.
日本画では墨の濃淡（濃墨・淡墨）を使い分けて描くことが多い。
In nihonga (Japanese painting) artists often use different ink tones (dark and light ink) selectively.
The black fluid produced by squid or octopus (squid/octopus ink), used as a cooking ingredient.
イカ墨のパエリアは、海の風味が濃くて人気がある。
Squid-ink paella is popular for its strong sea flavor.
このパスタはイカの墨で黒く色づけされている。
This pasta is darkened with squid ink.
Marking chalk/ink used by carpenters (inking string) or the line made with it; used to mark positions in construction and woodworking.
柱の位置を決めるために、職人は墨縄で真っ直ぐな線を引いた。
To determine the position of the pillar, the carpenter snapped a straight line with the inking string.