Digital BW, The Print

Thanks for the interesting article. II wonder the stability of the thick (1/4 inch or so) of acrylic plastic used for lamination of color photographs. I don't know if the material applied cold or hot. I am being to appreciate the potential dangers in lamination.
Thanks again
Phil Lindsay 

      From: "'John Castronovo' jc@... [DigitalBlackandWhiteThePrint]" <DigitalBlackandWhiteThePrint@yahoogroups.com>
 To: DigitalBlackandWhiteThePrint@yahoogroups.com 
 Sent: Sunday, July 29, 2018 3:40 PM
 Subject: Re: [Digital BW] Re: the Red River online newsletter: glass or no glass?
   
     There are so many plastics and different grades within each type, but in general you need to stay away from PVC or vinyl. http://www.gaylord.com/resources/understanding-plastics-for-preservation   From: mailto:DigitalBlackandWhiteThePrint@yahoogroups.com Sent: Sunday, July 29, 2018 12:50 PMTo: DigitalBlackandWhiteThePrint@yahoogroups.com Subject: Re: [Digital BW] Re: the Red River online newsletter: glass or no glass? 

I used "GBC HeatSeal" laminating pouches, 3 mil "ultra clear" (11.5" x 17.5"), and a GBC heat press (roller).. I could not find any information on the company website about the actual material used.  The art market is pretty clearly not the intended user, so the material may be problematic in the long run.
As you said, "... unlike glazing, lamination actually becomes an integral part of the print so if 
anything happens to the laminate, the print is also ruined."  Hence my concern. 
 "Some plastics will outgas, yellow and deteriorate becoming brittle over  time, and some are much more stable to the point of being considered  archival. The acidity of the adhesive also needs to be considered, and you  need to stay away from cheap rubber based adhesives and use only laminates  that use acrylic based adhesive."
Do you know of a specific product or brand that would fit the description and hence be at least approximately archival? 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