Science, Tech, Math › Science Tincture Definition and Instructions Share Flipboard Email Print Jonathan Kantor/Getty Images Science Chemistry Basics Chemical Laws Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Anne Marie Helmenstine, Ph.D. Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. our editorial process Facebook Facebook Twitter Twitter Anne Marie Helmenstine, Ph.D. Updated March 27, 2019 A tincture (tinc·tureˈ/tiNGkCHər) is an extract of a sample into a solution. Usually, the word tincture refers to an alcohol extract, although other solvents may be used. Tinctures most commonly are used to prepare extracts of plants, such as vanilla, lavender, and cannabis. However, the process also works with animal samples and nonvolatile inorganics, such as iodine or mercurochrome. Typical Tincture Preparation Place herbs in a container.Cover with an alcohol solution containing 40% ethanol, or a higher concentration. Vodka or Everclear are popular choices. Denatured alcohol is not suitable for tinctures to be taken orally.Seal the container and let it sit for 2-3 weeks, shaking the jar every now and then to ensure a good extraction.Filter out the plant matter. Save the liquid (the tincture), keeping it in a dark-colored bottle, away from direct sunlight and heat.