The terms scratch proof and scratch resistant are different by definition, but used synonymously by manufactures to promote their products. Scratch proof, if taken literally would mean that the product is able to withstand any kind of abrasion and not bear any scratches. However, it is impossible for manufactures to provide this kind of guarantee for delicate items like watches, eye-glasses and others. Scratch-proof, therefore, stands for more durability than scratch-resistant products.
Scratch resistant, on the other hand essentially means that the product is able to withstand minor scratches.
There are two ways to prevent scratches on delicate surfaces. This is possible either by reinforcing the material itself so that it can withstand damage for long, or by coating the surface by an external film or coating that shields it from damage.
