What surface color and finish indicate Gou Teng good quality?

What surface color and finish indicate Gou Teng good quality?

• A. Dull gray surface
• B. Bright pink surface
• C. Greenish surface with matte finish
• D. Purplish-brown or reddish-brown and glossy

Answer: (D)

Quality for Gou Teng is shown by surface color and finish because these signs reflect proper drying, storage, and condition of the herb. The best quality appears as a purplish-brown or reddish-brown color with a glossy, smooth surface. That glossy finish indicates the material was dried well and retained its integrity, while the dark brown to reddish-brown hue is typical of mature stems with low moisture content. A dull gray surface points to aging or poor drying; greenish with a matte finish suggests improper curing or freshness issues; a bright pink tone is not a normal characteristic and can indicate adulteration or contamination. So the combination of purplish- to reddish-brown color and a glossy surface signals good quality.

Quality for Gou Teng is shown by surface color and finish because these signs reflect proper drying, storage, and condition of the herb. The best quality appears as a purplish-brown or reddish-brown color with a glossy, smooth surface. That glossy finish indicates the material was dried well and retained its integrity, while the dark brown to reddish-brown hue is typical of mature stems with low moisture content. A dull gray surface points to aging or poor drying; greenish with a matte finish suggests improper curing or freshness issues; a bright pink tone is not a normal characteristic and can indicate adulteration or contamination. So the combination of purplish- to reddish-brown color and a glossy surface signals good quality.