From: Quality blues: traditional knowledge used for natural indigo identification in southern China
Criteria | Folk quality levels | Guizhou | Yunnan | Fujian | ||||
---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | FC/QI/FL | FC/QI/FL | FC/QI/FL | |
Color | Dark blue, deep purple-red | Dark blue, reddish | Blue | Blue-black, black | Light blue, bluish grey, turquoise | 171/1.00/100% | 70/1.00/100% | 42/1.00/100% |
Touch | Exquisite and smooth | Exquisite | Slight granular sensation | Granular sensation | Obvious granular sensation | 20/0.12/12% | 5/0.07/7% | 9/0.21/21% |
Taste | – | – | – | – | – | 47/0.27/27% | 2/0.03/3% | 0/0.00/0% |
Dyeing ability | Easy | Easy | General | Difficult | Hard | 11/0.06/6% | 3/0.04/4% | 0/0.00/0% |