<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I think glass is rated at 100 & polyester at about 80.<div><br><div> <span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div>Al -</div><div>High Point, NC</div><div><br></div></span><br class="Apple-interchange-newline"> </div> <br><div><div>On Feb 24, 2012, at 5:58 PM, Ron Nossaman wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>On 2/24/2012 3:30 PM, Joseph Garrett wrote:<br><br><blockquote type="cite">My question is: What, specifically is "Shore hardness"??<br></blockquote><br>Hi Joe,<br>Shore is a set of scales to measure hardness ranges. Like the Rockwell scale for harder materials like steel. Shore A is for soft stuff like neoprene or cork/rubber gaskets and such. I suggested the Shore D scale, which should cover glue hardness ranges. The measurements are taken with a durometer which pushes a specifically shaped plunger into the measured material under a specified pressure load and measures penetration.<br><br>If you need an evening's reading in more detail, google Shore scale.<br><br>Ron N<br><br></div></blockquote></div><br></div></body></html>