In 1978, I used my first wood-cutting knife in Hangzhou, China. In 2002, my last etching plate was accidentally discarded after two trial impressions in Portland, Oregon.
1978年在中国杭州第一次拿到木刻刀，2002年在美国波特兰丢了仅仅打了样的最后一块铜版，做了二十五年版画。
Etching machine in normal operation, the first I put a feeding trial with engraved stainless steel plate, it will slow conveyor belt into the machine.
蚀刻机运转正常后，先在入料口放一块试刻用的不锈钢板，传送带会把它缓慢的送入机器内部。
Meanwhile, the difference in thermal conductivity of underlining materials (plastic sheet, steel sheet and aluminium plate) has little effect on the etching rate.
研究还发现，不同垫层（塑料片、钢片和铝板）导热性能对刻蚀速率影响很小。
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