cutting-sample.md

@@ -2,7 +2,7 @@ Cutting samples out of photoelastic material
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 [Precision Urethane](http://www.precisionurethane.com/) large diversity of shapes
-
+[Vishay](http://www.vishaypg.com/micro-measurements/)
 
 
 Material sheets
@@ -10,6 +10,7 @@ Material sheets
 
 you can buy [sheets](http://www.precisionurethane.com/urethane-sheets.html) or [pads](http://www.precisionurethane.com/polyurethane-pads.html) depending on the thickness you want.
 pick thickness dimension and hardness we strongly encourage you not to buy to hard material (>70A) because the material can be knocked or folded during the shipping and residual stress can be induce. unless you specify it to the company.
+[Pads from Vishay company](http://www.vishaypg.com/micro-measurements/photo-stress-plus/category/coating/?subCategory=materials)