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Hydrocolloid dupclicating issue
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<blockquote data-quote="Inna-Hurry" data-source="post: 291300" data-attributes="member: 7958"><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." Sanitizer residue=MOISTURE. (This is what I was thinking of and happens with Cavicide)</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." = MOISTURE film</p><p></p><p></p><p> If the negative is DRY- your model will have no soft spots. A residue of a liquid is considered moisture to me.</p><p></p><p>ALWAYS.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite7" alt=":p" title="Stick Out Tongue :p" loading="lazy" data-shortname=":p" /></p></blockquote><p></p>
[QUOTE="Inna-Hurry, post: 291300, member: 7958"] "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." Sanitizer residue=MOISTURE. (This is what I was thinking of and happens with Cavicide) "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." = MOISTURE film If the negative is DRY- your model will have no soft spots. A residue of a liquid is considered moisture to me. ALWAYS.:p [/QUOTE]
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