Return-Path: Received: from acp.arrowplastics.com ([204.155.155.46]) by truman.olsusa.com (Post.Office MTA v3.5.1 release 219 ID# 0-52269U2500L250S0V35) with SMTP id com for ; Fri, 17 Sep 1999 08:55:42 -0400 Received: from Primary-Message_Server by acp.arrowplastics.com with Novell_GroupWise; Fri, 17 Sep 1999 08:00:20 -0500 Message-Id: Date: Fri, 17 Sep 1999 07:59:38 -0500 From: "Dick Simkanin" To: Subject: Polycarbonate Mime-Version: 1.0 Content-Disposition: inline X-Mailing-List: lancair.list@olsusa.com <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Although some clear plastics carry a UV rating, and contrary to popular belief, any material that passes light can not stop 100% of the UV. Also keep in mind that just because a plastic is polycarbonate, it is NOT nessasarily UV rated. There are many grades of PC and some have no UV protection at all. Plasticizers are added to plastic to make then UV resistant. If you read the SPE-SPI standard spec., you will find that the highest UV rating blocks about 90% of the UV rays. Resistant is the key word, If you are purchasing clear plastic such as Lexan (polycarbonate) for UV protection, make sure it carries a UV rating. If it dosen't have the rating, it will pass close to 100 % UV. For further info on Lexan and UV protection contact General Electric Corp., manufactures of polycarbonate Lexan. On a second note, I have a 80 ft. X 100 ft. hanger that I purchased some time ago and now can not take delivery of. It is brand new, still at the manufacture's location ready for shipment. I would be willing to let this building go for $5.25 sq. ft. If you are interested, contact me at dick@arrowplastics.com Dick > LIV-P N80D >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html