In short, solventless hash is a concentrate that has been extracted using only ice, water, and a little agitation – no butane, ethane, or any other solvent. With this truly OG, old-world hash method of resin separation, 710 Labs puts fresh-frozen, whole-plant cannabis into large buckets of ice water with a mesh filter lining. They then agitate the flower with paddles to knock off resin glands, which eventually form your hash. 710 Labs has worked to perfect the process so that they can isolate just the trichome heads.