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BENDING AFTER HEAT - GB/T4085-2005

1. TOOLS
1.1 Drying equipment, ensuring free internal circulation of air and accurate to +/-2 ℃
1.2 Vernier caliper accurate to 0.01 mm

2. SAMPLING
3*250x250 mm

3. ENVIRONMENTAL CONDITIONS
Condition the samples for 24 hours at 23(+/-2) ℃ and 50(+/-10)% relative humidity

4. TESTING PROCEDURE
4.1 Place each sample on a flat glass and then place the flat glasses in the drying equipment at 80(+/-2) ℃  

4.2 Distance between flat glass and wall of equipment min 50 mm; distance between flat glasses min 100 mm
4.3 Take out the flat glasses (and the samples on them) after 6 hours; condition them for 24 hours; then measure the distance between 3 samples' corners and the glass right beneath them

4.4 Average the results and round them to 1 mm

5. ASSESSING TEST RESULTS
Passing requirement: ≤2 mm



 
  
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