Shellac, a natural gum resin, is manufactured using two ingredients, ethyl alcohol, and raw seed lac. Sticklacs, or sap encrusted brunches, are collected and transported to refineries. This raw seed lac is then either hand refined or mechanically separated, and then scraped to remove the secretions from individual twigs.

Sticklac and grainlac is ground to a fine mixture and forced through a screen to remove most impurities. This shellac flakes India is then collected in large containers, and stomped to crush the granules to a fine paste. This process also separates the red dye from the lac seeds, which is then washed clean along with any remaining impurities. This mixture, also known as seedlac, and acts as the raw material for both orange shellac and bleached shellac.

Seedlac is further processed using mechanical equipment using either heat process, or solvent process. These are the two primary methods of manufacturing machine made shellac in India.

Heat Process

In this process, seedlac is first melted on large grids using indirect heating. The liquid is then forced through a fine mesh or cloth, and the filtered product is collected to a large steam- heated boiler.

The liquid is then transferred through rollers to create large, thin sheets of shellac. This is then broken into smaller shellac flakes India, and mixed with denatured alcohol to create a consumer-ready product.

Solvent Process

Another common process to manufacture shellac wax India is via the solvent process. In this process, the seedlac is mixed with industry grade solvents, usually ethyl alcohol, before it is refluxed and filtered. The filtered shellac is then sent through evaporators to remove the alcohol, which gives it the characteristics viscous form.

Manufactures and shellac exporters in India then runs the viscous liquid through rollers, giving it thin sheet-like shape, which is then dried and broken for export.

In recent years, the demand for a clear shellac has increased significantly. Manufactures produce bleached shellac India to remove the red dye from shellac seeds during the refining process.

Bleached Process

Manufacturing bleached shellac begins with dissolving seedlac in an alkali-soluble, water- based solution of sodium carbonate. This mixture is then filtered to remove any impurities, and bleached with sodium hypochlorite solution to give it the desired colour.

The bleached shellac India is then precipitated with using diluted sulfuric acid and washed with water. This finished component is dried in vacuum driers and ground to a fine powder for final export.

Quality Control

Every step of manufacturing handmade and machine made shellac in India is proceeded with strict quality control. The shelf life and flow of the finished product is of great concern to both us and our customers. We carefully remove impurities from the seedlac before processing it, ensuring only the highest quality of finished product. Moreover, every step of the mixing, processing, and refining process is monitored for efficient and quality manufacturing.

Bleached (White) Shellac is prepared by dissolving the Lac in aqueous sodium carbonate, bleaching the solution with sodium hypochlorite and precipitating the Bleached Shellac with hydrochloric acid. Removal of the wax, by filtration, during the process results in Bleached Dewaxed Shellac.

Lac is the resinous secretion of lac insect and its color is Laccifer lacca Kerr parasite on certain trees in Leguminosae and Moraceae plant. It forms the resinous layers like stick making the lumps around the twigs, and is called Sticklac. Sticklac is crushed, sieved and removed insect bodies, pieces of twigs and water soluble dye, etc. by washing, and is named Seedlac. Lac dye is the water soluble coloring matter refined, and is used as edible colors or dye. Shellac is a natural polyester resin refined from Seedlac.

Ordinary Shellac is produced either by a process of filtration in the molten state or by solvent process. Shellac has two kinds of types depending on retain most of its wax or dewaxed. In addition, Shellac is graded by whether it purified or bleached its natural color.

Bleached (White) Shellac is prepared by dissolving the Lac in aqueous sodium carbonate, bleaching the solution with sodium hypochlorite and precipitating the Bleached Shellac with hydrochloric acid. Removal of the wax, by filtration, during the process results in Bleached Dewaxed Shellac.

Shellac is also manufactured by thermal fusion method in foreign countries as well.

Shellac is the only thermo-setting resin as natural resin.

  • It is soluble well in alcohol in the normal temperature, and melt easily for heating, but not influenced to heat and solvents after once curing.
  • Strong oil resistance.
  • Nonconductor of electricity.
  • Excellent abrasion resistance.
  • After coating the varnish, the thin film of Shellac forms the smooth surface that is rich in abrasion resistance, adhesion and durability.
  • It is insoluble in water and many of solvents except alcohol.
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