Saidchang upper white and lower black hiding force cardboard is a black and white half of the hiding power test paper, using coated paper, the surface is covered varnish, suitable for paint, plastic, ink, hardware, printing, varnish and other industries users use, the applicability is relatively wide.
1. The reflectance value of white is 80±2, and the reflectance value of black is <1;
2. The paper is coated paper with double-sided lamination
3. CompliantGB1726-88National standards.


