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1·Protect a is a pure, matt grey coloured chromium coating with a pearly surface structure.

保护是一个纯粹，马特灰色有色铬镀层的珠光表面结构。

2·The rutile TiO_2(sulfate process) was treated with inorganic salts to form a porous coated film that increases its dry hiding power in matt emulsion coating films.

硫酸法金红石型二氧化钛用无机盐类进行表面处理后，形成疏松多孔的海绵状包膜，提高了它在平光乳胶漆膜中的干遮盖力。