In order to improve the glossiness of acid etched wafer and achieve stable mass production. by optimizing process of producing silicon wafer. rotate and grind the wafer to be double-sided grinding wafer. then acid etch the wafer. https://www.bekindtopets.com/amazing-price-NHL-Chicago-Blackhawks-Blast-iPhone-14-Plus-Clear-Case-p35668-mega-super/