The Eulan treatment developed by Dr. Ernst Meckbusch in the late 1930s has revolutionized the treatment and protection against moth damage in textiles and zoological objects. Eulan U33 has far surpassed the effectiveness of products such as DDT, arsenic, or camphor and has shown none of the toxic and destructive side effects of those products. Eulan is a chemically indifferent matter and guarantees lifetime protection. Includes a detailed description of the process involved.