Item

Data

Adsorption   capacity   %

RH = 20%   ≥

9.0

RH =50%   ≥

22.0

Qualified size   %          ≥

90.0

Loss on drying   %        ≤

2.0

Color Change

RH = 20%

Red

RH = 35%

Orange red

RH = 50%

Orange yellow

Primary color

Purple red