Thick(普厚）: 250 grams of white cardboard production; thickness: about 0.34 mm
Medium thickness（中厚）: 300 g white cardboard making ‘; thickness: about 0.4 mm
Thickening
（加厚）
: 350 g white cardboard production; thickness: about 0.5 mm
Double-sided film,
Double-sided printing,
Double-sided text
Material:
Environmental protection anti-myopia special white cardboard
