{"id":464782,"date":"2024-10-20T10:36:53","date_gmt":"2024-10-20T10:36:53","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bsi-pd-iso-tr-219582019\/"},"modified":"2024-10-26T19:34:15","modified_gmt":"2024-10-26T19:34:15","slug":"bsi-pd-iso-tr-219582019","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bsi-pd-iso-tr-219582019\/","title":{"rendered":"BSI PD ISO\/TR 21958:2019"},"content":{"rendered":"<p>This document describes the most commonly used test methods considered in standardization work relating to scratch and abrasion resistance of plastic spectacle lenses along with their technical capacities and limitations. It includes the ISO\u00c3?\u00c2&nbsp;test method for assessment of claims for basic abrasion resistance in <span class=\"std\"><span class=\"std-ref\">ISO\u00c3?\u00c2&nbsp;8980-5<\/span><\/span>.<\/p>\n<p>This document is intended to be of benefit to any future interest in ISO\u00c3?\u00c2&nbsp;standardization on scratch and abrasion resistance of spectacle lenses.<\/p>\n<h4>PDF Catalog<\/h4>\n<table border=\"1px\" class=\"des-table\">\n<tr>\n<th>PDF Pages<\/th>\n<th>PDF Title<\/th>\n<\/tr>\n<tr>\n<td><b>2<b><\/td>\n<td>undefined  <\/td>\n<\/tr>\n<tr>\n<td><b>6<b><\/td>\n<td>Foreword  <\/td>\n<\/tr>\n<tr>\n<td><b>7<b><\/td>\n<td>1 Scope <br \/> 2 Normative references <br \/> 3 Terms and definitions <br \/> 4 Background  <\/td>\n<\/tr>\n<tr>\n<td><b>8<b><\/td>\n<td>5 Mechanisms of mechanical abrasion and scratching of lens surfaces <br \/> 5.1 Discussion and scratch mechanisms  <\/td>\n<\/tr>\n<tr>\n<td><b>10<b><\/td>\n<td>5.2 Testing and the different forms of damage  <\/td>\n<\/tr>\n<tr>\n<td><b>11<b><\/td>\n<td>5.3 \u200bAssessing surface damage <br \/> 6 Test method description <br \/> 6.1 Steel wool test <br \/> 6.1.1 Principle <br \/> 6.1.2 Description  <\/td>\n<\/tr>\n<tr>\n<td><b>13<b><\/td>\n<td>6.1.3 Pros and cons <br \/> 6.2 Tumble test <br \/> 6.2.1 Principle  <\/td>\n<\/tr>\n<tr>\n<td><b>14<b><\/td>\n<td>6.2.2 Description  <\/td>\n<\/tr>\n<tr>\n<td><b>15<b><\/td>\n<td>6.2.3 Pros and cons <br \/> 6.3 Eraser test <br \/> 6.3.1 Principle <br \/> 6.3.2 Description  <\/td>\n<\/tr>\n<tr>\n<td><b>17<b><\/td>\n<td>6.3.3 Pros and cons <br \/> 6.4 Bayer test (Oscillating abrasive grain test) <br \/> 6.4.1 Principle  <\/td>\n<\/tr>\n<tr>\n<td><b>18<b><\/td>\n<td>6.4.2 Description  <\/td>\n<\/tr>\n<tr>\n<td><b>19<b><\/td>\n<td>6.4.3 Pros and cons <br \/> 6.5 Nano scratch (Diamond point loading device) <br \/> 6.5.1 Principle  <\/td>\n<\/tr>\n<tr>\n<td><b>20<b><\/td>\n<td>6.5.2 Description <br \/> 6.5.3 Pros and cons  <\/td>\n<\/tr>\n<tr>\n<td><b>21<b><\/td>\n<td>6.6 Taber abrasion wheel test <br \/> 6.6.1 Principle <br \/> 6.6.2 Description  <\/td>\n<\/tr>\n<tr>\n<td><b>22<b><\/td>\n<td>6.6.3 Pros and cons <br \/> 6.7  ISO 8980-5 \u201cMinimum requirements for spectacle lens surfaces claimed to be abrasion-resistant\u201d <br \/> 6.7.1 Principle  <\/td>\n<\/tr>\n<tr>\n<td><b>23<b><\/td>\n<td>6.7.2 Description <br \/> 6.7.3 Pros and cons  <\/td>\n<\/tr>\n<tr>\n<td><b>24<b><\/td>\n<td>7 Conclusion  <\/td>\n<\/tr>\n<tr>\n<td><b>25<b><\/td>\n<td>Bibliography  <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p><b>Ophthalmic optics. Review of the test methods used to assess scratch and abrasion resistance of spectacle lenses<\/b><\/p>\n<table class=\"shortdes-table\" style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/bsi\/\"><b>BSI<\/b><\/a><\/td>\n<td>2019<\/td>\n<td>26<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":464792,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[145,2641],"product_tag":[],"class_list":{"0":"post-464782","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-11-040-70","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/464782","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/464792"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=464782"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=464782"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=464782"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}