Â© Johnson Matthey 2017 - Tel. +44 (0)1763 253200 - Email: mj@matthey.com Accessibility Terms of Use Privacy Policy Sitemap We use cookies to help understand how people use our website.
Fresh cannabis plants are around 80% water (all %'s by weight); curing generally begins after the cannabis has lost half of it's initial mass, and contains approximately 33% of it's initial water.
Officials obtained the samples from a type of Mexican marijuana that is known to contain low levels of THC -- 0.4 to 1 percent [source: Kuhn et al.]. When these levels are compared to other types of marijuana, it looks as if potency levels have risen in the last 30 years.