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Hydrocolloid dupclicating issue
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<blockquote data-quote="JMN" data-source="post: 291291" data-attributes="member: 8469"><p>I'd back up a bit on the global. Usually? oh indeedy Capt'n Speedy! Always? A solid 'eh'.</p><p></p><p>There are some sanitizers which if not rinsed out of the impression thoroughly will cause similar appearances of a more chalky or lighter surface.</p><p>This was occasionally but not always with a very minute layer of improperly set stone.</p><p></p><p>When I was primarily a C&B model monkey there was one office who's impressions always had to be extra carefully rinsed for this reason. I believe it was Birex they were using.</p><p>Even if you poured it dry, it would still change the model color.</p><p></p><p>We're playing with chemistry, just simplified some by following the prescribed methods.</p><p>Much like cooking. Nobody wonders why the bread didn't come out right when they overheat it and leave out 1/2 the yeast...</p></blockquote><p></p>
[QUOTE="JMN, post: 291291, member: 8469"] I'd back up a bit on the global. Usually? oh indeedy Capt'n Speedy! Always? A solid 'eh'. There are some sanitizers which if not rinsed out of the impression thoroughly will cause similar appearances of a more chalky or lighter surface. This was occasionally but not always with a very minute layer of improperly set stone. When I was primarily a C&B model monkey there was one office who's impressions always had to be extra carefully rinsed for this reason. I believe it was Birex they were using. Even if you poured it dry, it would still change the model color. We're playing with chemistry, just simplified some by following the prescribed methods. Much like cooking. Nobody wonders why the bread didn't come out right when they overheat it and leave out 1/2 the yeast... [/QUOTE]
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Hydrocolloid dupclicating issue
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