... printing, ceramics, chemical industry, textile, building materials, food, salt, etc. The meter measures whiteness, yellowness, color and color difference ... pulps - Measurement of diffuse blue reflectance factor (ISO brightness)GB/T 7975: Paper and board - Determination of color (diffuse ... strength and color difference of dyes (Instrumental method) GB/T 8424.1: Textiles-Tests for color fastness General ...