The unique way of natural dyeing in Ri-Bhoi.

Weavers of Ri-Bhoi use natural dye fixative or mordants to improve or maintain colour when dying with eri silk.

For achieving better colour fastness properties, the Eri silk is often pre-mordanted before dying and for achieving some shades post-mordanting is also done.

Some of the natural mordants are Sohkhu leaves (Baccaurea ramiflora lour), Diengrnong (local name) Tree bark, Sohtung leaves (terminalia chebula retz), Nuli leaves (Litsea Salisifolia), Waitlam Pyrthat leaves (Oroxylum Indicum) and Snep Sohmylleng (Tsuga canadensis).