http://www.netvouz.com/lespet/tag/invisible?feed=rss lespet's bookmarks tagged "invisible" on Netvouz http://www.alibaba.com/product-gs/208229593/Invisible_bifocal_lens.html Invisible bifocal -Specification   1)Reflative index:N=1.499   2Specific Gravity:1.32   3)Demeter: 70mm/28mm   4)Abble Value=58   5)Transmission: over 91% biznes lespet Tue, 28 Oct 2008 12:55:15 GMT http://info.hktdc.com/imn/08072504/office003.htm The invisible writing pen that's become a fad on the Chinese mainland is both a toy as well as a security device for businesses. Retail prices are going down, while the pen is becoming increasingly popular. biznes lespet Wed, 19 Nov 2008 18:00:44 GMT http://www.alibaba.com/product-gs/205631946/Photochromic_Invisible_Bifocal_lens.html Photochromic Invisible Bifocal lens -Specification   1)Reflative index:N=1.56   2Specific Gravity:1.32   3)Demeter:70mm/28mm   4)Abble Value=38 -Raw Material   biznes lespet Tue, 28 Oct 2008 14:43:38 GMT