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<p>[QUOTE=&quot;Conder101, post: 956890, member: 66&quot;]I have seen stressed plastic diffraction before and I don&#039;t believe that is what is causing it.&nbsp; These &quot;rainbows&quot; tend to be where the insert touches the outer shell plastic and I believe what you are seeing is an interference diffraction pattern caused by traces of moldslip remaining on the plastic.&nbsp; (Moldslip is a oil the injection molds are coated with to keep the plastic from sticking to the molds during the fabrication process.)[/QUOTE]</p><p><br /></p>

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