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<p>[QUOTE="krispy, post: 617562, member: 19065"]In traditional printmaking processes, Intaglio prints made from etched copper plates uses a harsh acid recipe of Potassium Chlorate and Hydrochloric Acid mixed into water, typically called a Dutch Mordant. Once the chemicals are mixed together in a large flat tray/bath, you need to get the bath active before immersing printing plates in to etch a design on the plate. Professional fine art printmaking studios and art schools that still use these mordants can use scrap copper bits from old plates to activate the mordant but I recall <b>sacrificing numerous pre-1982 Lincolns</b> for the sake of art when I was getting my degree. </p><p><br /></p><p><br /></p><p>Intaglio explanation for those curious. </p><p>It's still the basis of how our paper currency is printed:</p><p><a href="http://en.wikipedia.org/wiki/Intaglio_%28printmaking%29" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://en.wikipedia.org/wiki/Intaglio_%28printmaking%29" rel="nofollow">http://en.wikipedia.org/wiki/Intaglio_(printmaking)</a></p><p><br /></p><p>The Art of Etching (Google books):</p><p><a href="http://books.google.com/books?id=oxdw5-lVNVAC&pg=PA52&lpg=PA52&dq=dutch+mordant+wiki&source=bl&ots=9h5w2vFKmj&sig=-b0nG0FYuAPTzHSCO4a3QCLt9_c&hl=en&ei=jAc5SuqLFqW1tweplNXmDA&sa=X&oi=book_result&ct=result&resnum=8#PPA1,M1" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://books.google.com/books?id=oxdw5-lVNVAC&pg=PA52&lpg=PA52&dq=dutch+mordant+wiki&source=bl&ots=9h5w2vFKmj&sig=-b0nG0FYuAPTzHSCO4a3QCLt9_c&hl=en&ei=jAc5SuqLFqW1tweplNXmDA&sa=X&oi=book_result&ct=result&resnum=8#PPA1,M1" rel="nofollow">http://books.google.com/books?id=oxdw5-lVNVAC&pg=PA52&lpg=PA52&dq=dutch+mordant+wiki&source=bl&ots=9h5w2vFKmj&sig=-b0nG0FYuAPTzHSCO4a3QCLt9_c&hl=en&ei=jAc5SuqLFqW1tweplNXmDA&sa=X&oi=book_result&ct=result&resnum=8#PPA1,M1</a>[/QUOTE]</p><p><br /></p>
[QUOTE="krispy, post: 617562, member: 19065"]In traditional printmaking processes, Intaglio prints made from etched copper plates uses a harsh acid recipe of Potassium Chlorate and Hydrochloric Acid mixed into water, typically called a Dutch Mordant. Once the chemicals are mixed together in a large flat tray/bath, you need to get the bath active before immersing printing plates in to etch a design on the plate. Professional fine art printmaking studios and art schools that still use these mordants can use scrap copper bits from old plates to activate the mordant but I recall [B]sacrificing numerous pre-1982 Lincolns[/B] for the sake of art when I was getting my degree. Intaglio explanation for those curious. It's still the basis of how our paper currency is printed: [URL="http://en.wikipedia.org/wiki/Intaglio_%28printmaking%29"]http://en.wikipedia.org/wiki/Intaglio_(printmaking)[/URL] The Art of Etching (Google books): [URL]http://books.google.com/books?id=oxdw5-lVNVAC&pg=PA52&lpg=PA52&dq=dutch+mordant+wiki&source=bl&ots=9h5w2vFKmj&sig=-b0nG0FYuAPTzHSCO4a3QCLt9_c&hl=en&ei=jAc5SuqLFqW1tweplNXmDA&sa=X&oi=book_result&ct=result&resnum=8#PPA1,M1[/URL][/QUOTE]
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