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UL2556 Kraft Felt
UL2556 clause7.19 Durability of ink printing
A kraft felt with a thickness of 1.2 ±0.25 mm (0.05 ±0.01 in) not having more than 30% wool content and the remainder of the composition being rayon.
Specification：
Material: 30% wool, 70% rayon.
Dimensions: 9 inches (22.9cm) wide x 12 inches (30.5cm) long x approximately 3/64 inch-1/16 inch (1-1.6mm) thick.
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