Seedlac is the product of the Lac insect. There are three main grades: Kusmi, Bysaki and Siam. Kusmi is the best grade. It is the lightest in color and contains about 3% foreign matter and about 5% wax. Bysaki it the second lightest and Siam is the darkest. Siam however, contains 2% less wax than Kusmi or Bysaki.