Dewaxed Lemon Shellac (Physical Data)

Under solvent process wax and impurities are practically completely removed by dissolving the seedlac in a suitable solvent, usually, chilled industrial alcohol. The solution is then filtered through fine cloth and the alcohol is recovered by boiling the solution. The molten shellac is then stretched to the required thickness on a roller. The product does obtained is known as Dewaxed Shellac. Highly sophisticated grades of dewaxed and Decolourised Shellac can be produced by this method by adding activated carbon as the decolouring agent. The impurity is around 0.2%.

Grades of Dewaxed Shellac :-

1. Dewaxed Orange
2. Dewaxed Lemon

Dewaxed Orange Shellac (Physical Data)
Colour Gardner in 20% ethanol max 16
Acid No. (DAB 9) : 65-80
Arsenic (DAB 9) : max. ppm 1.5
Ash (DAB 9) : max. % 0.2
Melting Range (DAB 9) : 65-85 C
Moisture : max. % 2.0
Saponification No. (DAB 9) : 190-230
Wax (USP XXIII) : max. % 0.2