404?
Тогда так:
1. http://www.ipmsstockholm.org/
2. "Search for:" "Etching"
3. Первый же результат:
Tech Tips:
Chemical Etching
Chemical Etching About etching The technique >> >> >> This page n by
This material has
been first published on the home page of , Canada.
http://www.ipmsstockholm.org/magazine/2002/04/stuff_eng_tech_etching.htm
Там и кликаем
удачи
