Flatness of Shutter
"(twist, cupping and warping)" : not more than 1 mm
Screw Holding Strength (kg) : > 200
Preservative Treatment : Two Tier Treatment:
1. Lumber and Veneers are treated with preservatives
2. Glue Line is fortified with non- leachable organophosphorous compound (USA technology)
Misuse of the Shutter : no permanent deformation after the test
Impact Indentation : not more than 0.2 mm by a weight of 0.5 kg
Specific Gravity : 0.60
Slamming of the Shutter : no visible impact after 25 impacts of 15 kg