Literature Review of Colour Reduction Technologies for Kraft Pulp Mill Effluent

A support pillow for supporting a head or a person when in a supine position comprises a cushion member having a support region at least partially surrounding a pressure relief region. The support region is configured to support at least a portion of a head, and the pressure relief region is configured to receive at least a portion of a back side of the head such that pressure applied to the back side of the head is reduced when lying in a supine position.