1. Surface treatment method for a substrate using denatured urushiol derived from toxicodendron vernicifluum

2. Urushiol oil can remain active for several years, so handling dead leaves or vines can cause a reaction.

3. Antipruritics, also known as anti-itch drugs, are medications that inhibit the itching (Latin: pruritus) often associated with sunburns, allergic reactions, eczema, psoriasis, chickenpox, fungal infections, insect bites and stings like those from mosquitoes, fleas, and mites, and contact dermatitis and urticaria caused by plants such as poison ivy (urushiol-induced contact dermatitis) or