{"product_id":"polarising-filter-stress-determination","title":"Polarising Filter Stress Determination","description":"Demonstrate stress patterns in solids with this new and valuable equipment. Two polarising filters, mounted on a graduated frame are placed on a plastic base. Clear acrylic pieces of different shapes are introduced between the filters; when pressure is applied to the solids the resulting stress patterns are observed.\u003cbr\u003eAn important method of demonstrating polarisation and stress. Includes instructions.\u003cbr\u003eGrades 9+","brand":"Supertek Science","offers":[{"title":"Default Title","offer_id":49975057088789,"sku":"SPSPH30642","price":138.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0857\/4897\/3845\/files\/PH30672.jpg?v=1781497362","url":"https:\/\/unitedsupplycorp.com\/products\/polarising-filter-stress-determination","provider":"United Supply Corp.","version":"1.0","type":"link"}