Although they may seem like a recent innovation in the cannabis space, hash oil concentrates are not new. The earliest modern account of cannabis concentrate use was noted in declassified CIA documents from World War II. Hash oil was developed as a tool to aid in interrogation of war criminals and said to relax interrogation subjects. The CIA extracted THC from three cannabis strains and placed the hash oil into cigarettes since inhalation provided the most desired effects. The hash oil cigarettes were used in project MK Ultra.
Since MK Ultra, hot knifing became a primary way of dabbing cannabis concentrates. Prior to the invention of dab rigs and the accessories we know and love today, hash oil was consumed by heating a knife and “carbing” it with a dome, downstem or other types of glass. By 1977 hash oil became more widely recognized. Michael Starks wrote a detailed account of at-home concentrate production in his book Marijuana Chemistry: Genetics Processing and Potency. Between 1977 and the late 90’s, the internet paved the way for cannabis enthusiasts to learn more about butane hash oil production.
Erowid, an online forum dedicated to psychoactive substances, is credited for promoting the development of the first closed-loop system. In 2010, hash oil made it mainstream with its first debut at the High Times Cannabis Cup. Since then, we’ve witnessed the complete evolution of extracts and there are no signs of it slowing down. In eight short years we have seen exponential growth in cannabis hash oil technology and product development. We’ve witnessed the evolution of hash into some of the most potent and photo-worthy products on the market today. From dry wax and soupy butane hash oil to glistening FSE’s, live resins and pungent solventless, the industry has come a long way.