Dej-raws li iav Frosting hmoov kom Etch Soda txiv qaub iav fwj tiv thaiv ntiv tes

I. Pre-face Etching chemical reacts nrog iav nto sai sai nyob rau hauv lub tswv yim ntau lawm, los tsim ib tug homogeneous satin nyhuv raws li muaj ib tug zoo sib xws repetition ntawm pib nres cov ntsiab lus uas ua rau ib tug uniform repartition ntawm lub pyramids thiab ib tug zoo frosted nyhuv. II. Specification...