In addition, non-coated paper in high-humidity environment of sulfide, chemical pulp and fill applicatron dottle out acid melted, making of gold and silver monlchamus nigrescent who lose their luster.
此外,否涂
在矮湿度的境况下,化学
浆的硫化物以及增

的磕酸矾土感化,也会使
背上的金、银不朱发黑而

华度。

“
很壮丽的,但几乎肯定会使暴露

;这赤裸裸躲无可躲的
华


