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<p>[QUOTE=&quot;calcol, post: 2444723, member: 77639&quot;]Is there any way to buy the NGC cardboard boxes?&nbsp; In any event, I&#039;d like to avoid cardboard or wood because of potential out-gassing of chemicals, either from the material itself or the finish.&nbsp; Many slabs are not airtight or watertight, something some collectors have learned the hard way. This is an avoidable fault that could be corrected by the grading companies.&nbsp; Slabs should be sealed in an inert atmosphere (argon would work nicely) too, but aren&#039;t. The right plastics avoid the out-gassing issue.&nbsp; The safest materials of all are glass and certain metals, but those aren&#039;t too practical.</p><p><br /></p><p>Cal[/QUOTE]</p><p><br /></p>

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