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。
The single-side adhesive felt can be replaced periodically; and during replacement, take off the worn felt and then adhere a new layer of felt.
所述的 单面带胶毛毡可定期更换，更换时将磨损的毛毡揭下来，重新粘附一层即可。
The mask layer can adhere to the polymer layer during thermoforming and other secondary processing steps.
在热成型及其它二次加工步骤中，掩模 层可以被附着在聚合物层上。
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