Specimens prepared by polishing and etching in a weak solution of nitric acid and alcohol reveal the lamellar structure of alternating plates that forms on slow cooling.
通过打磨并在弱硝酸酒精溶液中蚀刻制备的样本显示出由缓慢冷却形成的交互层状的薄片结构。
Aquatint: it is an etching process on copper or steel by means of nitric acid. in this technique a thin layer of resin dust is sprinkled on the plate and heated to make it adhere.
水彩色调：用硝酸在钢片或铜片上作腐蚀的蚀刻法。这个技巧是在版面上洒上一层薄薄的树脂粉，加热把它粘附于版面。
Aquatint: it is an etching process on copper or steel by means of nitric acid. in this technique a thin layer of resin dust is sprinkled on the plate and heated to make it adhere.
水彩色调：用硝酸在钢片或铜片上作腐蚀的蚀刻法。这个技巧是在版面上洒上一层薄薄的树脂粉，加热把它粘附于版面。
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