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<p>[QUOTE=&quot;Oldhoopster, post: 8151032, member: 84179&quot;]I was able to find some data for the vapor pressure of phthalates (the plasticizer that reacts with moisture to form hydrochloric acid). Vapor pressure is a good indication of how much material can be expected to be found as a gas at specific temp and pressure. </p><p><br /></p><p>I&#039;ve included a few other materials for reference .&nbsp; The units are Pascals (A unit of pressure) at room temp and atmospheric pressure .&nbsp; The higher the vapor pressure, the more gas you can expect.</p><p><br /></p><p>Acetone = 30,000 Pa</p><p>Ethyl Alcohol = 12,400</p><p>Isopropyl alcohol = 4,400</p><p>Water = 2,400</p><p>Ethylene glycol (antifreeze) = 7</p><p>Phthalates = 0.0000007 to 0.01 </p><p><br /></p><p>That indicates that there would be a minute amount of phthalates in the air.&nbsp; So any significant contamination of storage boxes would have to come through direct contact AND any gas phase from that contamination would be very small.</p><p><br /></p><p>IMO, it doesn&#039;t appear that there is enough phthalate gas to migrate into the small gaps of a folded Mylar flip or 2x2.&nbsp; However, there is nothing wrong with being cautious and discarding old boxes (at the added costs). <b>At least now, you can make the decision based on data, not unsubstantiated opinions being pushed as facts and proof.</b></p><p><br /></p><p>Note: The 2 papers I found are behind a pay wall but the abstracts are accessible.&nbsp; PM me for the links to the abstracts.[/QUOTE]</p><p><br /></p>

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