Ink Sac

Ink Sacs are obtained from squid by hitting or killing them and yield the darkest possible primary color dye.

Uses
The second recipe is not as cost-effective as making gray dye, then combining with another bone meal to make light gray dye. It yields 4 units of dye per ink sac vs. 3 in the first.
 * Make black wool by adding an Ink Sac to one block of wool.
 * Ink Sacs can be applied to sheep, but as of Beta 1.2, black sheep are naturally occurring.
 * Ink Sacs are a critical component of gray and light gray wool dyes.

Trivia

 * Obtained by killing squids.
 * Inc sacks are the darkest dye in the game.
 * Used to color wool
 * Can be combined with bone meal to make gray wool and light gray wool

Atrament