#ครั่ง

Lac, the resin secreted by the lac insect Laccifer chinensis, has long bridged ritual, traditional medicine, and industry. In Thai, it’s known as ครั่ง; in Chinese contexts it’s referred to as จุ้ยเก้ง. This glossy, carmine-tinted material has colored textiles, sealed documents, and temple murals. Today, researchers are revisiting lac’s pharmacological potential, sparked by early evidence that aligns with some traditional uses. How should health-focused readers interpret these claims?

Lac’s influence runs deep in Southeast Asia and the Indian subcontinent. In northern Thailand, rural communities cultivate lac via host trees, securing a versatile resource for dye, varnish, and healing preparations. Across India, Ayurveda venerates lac, while Chinese traditional medicine documents its presence in materia medica. Historic murals in Lanna and Ayutthaya celebrated lac’s cultural significance, while contemporary herbal practitioners in Thailand continue to cite its astringent, coagulant, antifungal, and bone-supporting properties.

Few substances straddle the worlds of ancient ritual, traditional medicine, and modern industry quite like lac (ครั่ง)—the intriguing resin secreted by the lac insect, Laccifer chinensis. Known in Thai as ครั่ง and in Chinese as จุ้ยเก้ง, this natural exudate has colored textiles, sealed documents, delivered vivid reds in temple murals, and, more quietly, worked as a healing agent in traditional remedies across Asia for centuries. Today, as scientists revisit the pharmacological potential of natural compounds, lac is in the spotlight once again—not only for its rich legacy but for surprising early evidence supporting some of its traditional uses. What makes this glossy, carmine-tinted resin so special, and how can today’s health-conscious readers separate myth from material fact?