Shellac is a natural resinous pigment which is found in the form of gum. The Shellac is manufactured with the help of ethyl alcohol and raw seedlac. Sticklac is used to make seedlac, which is a sap entrusted in the form of brunches. Sticklac is further processed to refineries. The industries use different methods of separation they either use the machines for separation or labour. The secretion is removed from every individual twig by scrapping process.

The Sticklac is the most essential thing for manufacturing shellac. The sticklac and grain lacs are mixed and grounded in fine granules, then it is screened to remove impurities. After the removal of impurities, the shellac flakes India are collected in large containers. Then it is crushed and stomped to make a proper paste. At this stage, the red dyes are removed from the shellac seed. The material is again washed and cleaned properly so it does not contain any impurities. The mixture which is obtained through the process is called seedlac, which is further processed to make shellac. The seedlac is the raw material of shellac. These raw materials are used to make dewaxed bleached shellac India and bleached shellac India.

Manufacturing Process Of Shellac In Industries 

The separation process is only applicable to get the raw material. The seedlac is further processed to get the high-quality shellac. Several machines are used to get the finished product. The two-primary process to manufacture shellac is heat process and solvent process. But there are many other processes which are taken into consideration. Here is the manufacturing process of Shellac in India:

  • Heat Process

First, the seedlac is melted on a large scale. The method of heating used is indirect. The liquid obtained after heating is forced through a clean cloth. This process is used to get the filtered product, which gets collected in a large steam heat boiler. A large roller is used after filtration. The liquid is passes through the roller to create many thin sheets of shellac. Therefore, this sheet is further crushed to get the shellac flakes India, which are mixed with alcohol to get the consumer ready product.

  • Solvent Process

The solvent process is a very common method of shellac wax extraction which is practiced by every manufacturing industry. The seedlac is mixed with ethyl alcohol before filtration process. The filtered seedlac is further sent to the evaporators for the removal of alcohol. Then it comes in a viscous state. The viscous liquid is run through the rollers to form thin sheets. These sheets are dried to make it harder and then broken down into shellac flakes for export.

  • Bleached Shellac

The first step to manufacture bleached shellac is to dissolve the seedlac in an alkali soluble or sodium carbonate. The impurities are removed with the help of a filtration process and bleached with a solution called sodium hypochlorite to get the perfect colour. The bleached shellac India is further precipitated with the dilute sulphuric acid. Then it is washed with clear water and dried in vacuum driers and ground to fine flakes to get the finished product.

  • Quality Control

Every process is performed very carefully, and the quality of the work is maintained efficiently. The customers are satisfied with the product as the shelf life and quality of the finished product is too good. The manufacturing industries ensure the quality of the product. The quality of work makes the natural resin for casting India. Removal of wax and impurities are done subsequently, which results in dewaxed bleached lac India

Why Shellac is known as the only Thermo-setting resin?

Shellac is a natural resin which is extracted from lac insects. These insects sit in certain trees such as Leguminosae and Moraceae. The colour of lac insect is Laccifer laca Kerr. The sticks get lumps and a resinous pigment forms around the twigs which is known as sticklac. Shellac is also known as the natural polyester, whose raw material is seedlac. Here are some reasons why it is known as thermo-setting resin:

  • Shellac is highly soluble in solutions in normal temperature.
  • It is a strong oil resistance substance.
  • It is a strong insulator.
  • Abrasion residence in nature.
  • Increase durability on its application on any materials.
  • It is only soluble in alcohol and insoluble in water.

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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