This industry favorite COSCO Tincture of Green Soap U.S.P. has been around since 1966 and is used by more tattoo artists than any other brand (Green Soap is also known as "Liniment of Soft Soap"). This natural soap is made from pure vegetable oils, glycerin and lavender and is biodegradable, environmentally safe and made in the USA. Use it for pre-tattoo skin preparation, stencil application, post-tattoo cleansing, as well as for cleaning surgical or tattoo instruments before sterilization. It is even an excellent lathering hand cleanser and shampoo! This soap is factory bottled and undiluted: beware of other dealers with off-brands, leftover stock or re-sellers who buy soap in bulk (drums) and re-package it themselves, as there is no way to ensure the soap is sanitary when it's been re-packed in someone's warehouse. We turn our stock frequently and all of our sizes (8oz, 16oz & gallons) are bottled by the manufacturer for safety. Diluting Suggestions: For cleaning instruments before sterilization - mix 1 part soap to 16 parts distilled water.