"Contrasting Ink" (nóngdànmò) in Xieyi uses both dark and light ink strategically to create depth, volume, texture, and atmosphere through visual contrast, with dark ink creating boldness and light ink adding distance and subtlety, requiring skilled blending to create tonal gradations, expressive depth, and nuanced interplay of light and shadow.
"Light Ink" (dànmò) is essential in Xieyi painting, using diluted ink to create subtle tones, soft washes, atmosphere, depth, and delicate transitions, requiring a mastery of brush control, ink dilution, layering, and a delicate touch to convey a sense of quiet beauty.