Testing

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CASS Testing – Copper-Accelerated Acetic Acid Salt Spray

In accordance with ISO 9227-2006, a 6” x 6” sample will be subjected to 120 hours of continuous salt spray using sodium chloride (50g / L of water) and .26 grams / L of copper chloride dehydrate to maintain an acidic pH.  After 120 hours, the mirror samples are removed, cleaned with water and dried.  The mirror will pass if none of the following have occurred:

1. Any clouding or darkening of the reflective surface.
2. Any undercutting, discoloration, blackening, or silver impairment of the mirrors on any of the four edges.
3. Any tarnish, spotting, or silver impairment greater than a total of 9 spots on the sample or a total impairment of greater than 3mm.

Salt Spray

To pass, this test states that a 6” x 6” sample will be subjected to 300 hours of continuous salt spray (in accordance with ASTM B 117) using a 20% solution of Sodium Chloride and none of the following will have occurred:

1. Any clouding or darkening of reflective surface.
2. Any undercutting, discoloration, blackening, or silver impairment of the mirrors on any of the four edges.
3. Any tarnish, spotting, or silver impairment greater than a total of 9 spots on the sample or a total impairment of greater than 3mm.

Safety Backing Testing

This test involves firing a 100 pound shot bag from 12 inches away.  A mirror is considered passing if the shot bag does not penetrate the mirror.  D&W offers an identification label applied directly to the safety backing material indicating the ANSI standard (Z97.1-1984) and our logo.

Lead Content

D&W has an industry leading lead content of 2.8% by weight.  While this may be considered low, D&W is always searching for ways to reduce this level even further.

Reflectivity

The reflectivity for D&W's second surface, silver mirror varies between 87% and 94% based on the thickness of the glass.