produced in two different ways- one is the heat process where the same
principle as in the case of hand made shellac is applied and the second
is solvent process where pure shellac is extracted from Seedlac by
suitable solvents. Under heat process the separation of pure lac is
achieved by melting Seedlac by steam heat and squeezing the soft molten
lac through filter my means of hydraulic presses. The molten lac is then
stretched by means of rollers into long continuous sheet which is
broken into pleces to form the machine made Shellac under heat process.
This shellac has an impurity content varying from 0.5 to about 1%. There
are various grades under heat process machine made shellac. The most
popular being TN, Lemon and Orange. These grades are exported to
practically all lac consuming countries..
click on the links
below for the details