1. Prepared by T. Madhavan & K. Chandrasekaran, Lecturers in Zoology, Directorate of School Education., Pondicherry. An Illustration for the students who aspire for medical studies.

2. Prepared by T. Madhavan & K. Chandrasekaran, Lecturers in Zoology, Directorate of School Education., Pondicherry. An Illustration for the students who aspire for medical studies. LAC INSECTS Lac is the resinous protective secretion produced by a kind of scale insect called laccifer lacca. They secrete a brown resinous substance called the lac. The minute red coloured larva of this insect settles on succulent shoots of the host plants. While growing they secrete a resinous material which covers them.

3. Prepared by T. Madhavan & K. Chandrasekaran, Lecturers in Zoology, Directorate of School Education., Pondicherry. An Illustration for the students who aspire for medical studies. LAC INSECTS The important trees needed for lac encrustation are the kusum, the ber, palas, babul, and sal. These trees are common in the western ghats. Lac bug

4. Prepared by T. Madhavan & K. Chandrasekaran, Lecturers in Zoology, Directorate of School Education., Pondicherry. An Illustration for the students who aspire for medical studies. USES OF LAC Lac is one of the most versatile natural resinous material. It is useful in the plastics, electrical, adhesive, leather, wood finishing and other industries. In the electrical industry it is used in the form of insulating varnishes and moulded insulators. It possesses very good adhesion to mica.

5. Prepared by T. Madhavan & K. Chandrasekaran, Lecturers in Zoology, Directorate of School Education., Pondicherry. An Illustration for the students who aspire for medical studies. It is an ingredient of varnishes, polishes, finishes wood used for protective and decorative purposes. It is a principal ingredient of sealing wax. -- also used in the manufacture of printing and water proof inks, optical frames, glazed paper, dental plates, wax crayons, nail polishes, ammunition, and bangles. USES OF LAC

6. Prepared by T. Madhavan & K. Chandrasekaran, Lecturers in Zoology, Directorate of School Education., Pondicherry. An Illustration for the students who aspire for medical studies.