1. Ihe mejupụtara kemịkalụ bụ silica inert, ọ nweghịkwa nchegbu banyere nnyonye anya ọrụ kemịkal;
2. Ihe na-agbanwe gburugburu. Na-eguzogide mmetụta, enwere ike iji ya ugboro ugboro
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7. The esichara workpiece nwere a matt mmetụta, pụta ìhè metal agba, adịghị nchara, wdg, na ọ dịghị mkpa ka pickled na embroider.
