... clean density: (1)unroasted shredded herbs ready for decoction(including herbal scraps,impurities)It is controled under 2%.(the velamen and ... drug and so on),and under 3%.(fruit-seed,grass,resin.)(2)roasted shredded herbs ready for decoction(including herbal scraps, ... ginger,wash etc.),under 2%.(roasted method:burning,bran,calcination,herbal soup etc.),and under 3%,(frying with earth,carbonizing, ...