Message:

<p>[QUOTE=&quot;lordmarcovan, post: 3296601, member: 10461&quot;]I don&#039;t know what&#039;s causing it, but some of the slabs noticeably had visible &quot;bubbles&quot;: an oily looking dark patch between the white insert and the clear outer shell, which would move around when pressed on.&nbsp; This phenomenon is described <a href="https://forums.collectors.com/discussion/740119/question-re-bubbles-in-ngc-slab" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://forums.collectors.com/discussion/740119/question-re-bubbles-in-ngc-slab" rel="nofollow">here</a> but there are no photos.&nbsp; It was like trapped moisture.&nbsp; I&#039;ve seen it with lots of the current-generation NGC holders.</p><p><br /></p><p>The slabs that once had these apparent bubbles of moisture trapped inside have since swollen and bulged noticeably, even causing the label inside to buckle, as if they&#039;re about to explode from within!&nbsp; Someone else posted a photo of this <a href="https://www.ngccoin.com/boards/topic/371379-defective-slab/" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.ngccoin.com/boards/topic/371379-defective-slab/" rel="nofollow">here</a>.</p><p><br /></p><p>Only the holders which once had those trapped bubbles are now bulged.&nbsp; My slabs have not been on an airplane except for when they were initially shipped from NGC, so altitude is not the issue.&nbsp; I live on the coast, at sea level.&nbsp; My coins are kept in a climate-controlled environment.</p><p><br /></p><p>They were briefly exposed to some heat (but not extreme sun) during the last hurricane evacuation when they were in my car.&nbsp; Heat may be what caused the swelling, but I notice that only the ones that once had those weird moisture bubbles inside have swollen and bulged- the rest are fine.</p><p><br /></p><p>A friend of mine has had similar bulging problems with some of his NGC slabs, and with relatively new ones at that.&nbsp; His have never been exposed to heat.&nbsp; Though he lives in the mountains (Western NC), he is not at especially high altitude (probably 3,000-4,000 feet at most).[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in