So after the water extraction and the removal of paracetamol, how can one solidify the codeine which is left in liquid form? to crystals or rocks or whatever it would be.. ? there must be a way!
you could make a strong solution where 10ml would be one dose and leave 30-40ml in a large plate for a few hours, scrape the crude extract and run another cwe to get rid of more apap or put it in capsules for later use.