Ink Sac

Ink Sacs are the darkest possible primary color dye.

As a drop
Ink sacs are obtained by killing squids. A single squid will drop between one and three ink sacs upon death.

Fishing
Ink sacs are occasionally caught as junk when fishing.

Trivia

 * In the statistics menu, the item name “Ink Sac” does not appear when the cursor is hovered over its image in the statistics page. This is due to it referring to all dyes combined.

Tintenbeutel Saco de tinta Poche d'encre Tintászsák Inktzak Atrament pt-br:Saco de Tinta Чернильный мешок 墨囊