Lac is a natural resin produced by the secretions of certain insects, primarily the lac insect known as Kerria lacca. These insects live on trees, particularly in tropical regions, and their secretions harden into a protective coating. This resin is harvested and processed to create various products, including varnishes, dyes, and food glazes. The process of collecting lac involves scraping it from tree branches, where it forms a crust. Once harvested, lac can be refined into different forms, such as shellac, which is widely used in woodworking and as a food-safe finish. Its versatility makes it valuable in many industries.