Curious how durable optical coatings are? Well we have the series for you! That’s Abrasive Parts 1-3 will explain the specifications for coating durability. From moderate to extreme testing, we’ll dive into how designers test their coatings and what makes them so strong! Part 1 will take you through moderate abrasion in 5 minutes or less! As always if you have further questions, you can always connect with the experts at nacl.com!