DETERMINATION OF MASS PER UNIT AREA  EN 430:1994 (adapted)
1. TOOLS
1.1 Balance accurate to 10 mg
1.2 Caliper accurate to 0.1 mm
2. SAMPLING
5 samples taken at equal distances from the original board. The distance between the outer edge of the board and the nearest edge of the samples shall be minimum 100 mm
(Full boards may also be tested, provided the test report specifies this point)
3. ENVIRONMENTAL CONDITIONS
The samples shall be preconditioned for at least 24 h at (23+/2) °C and (50+/5)% relative humidity
The test shall be performed in the same environmental conditions
4. TESTING PROCEDURE
4.1 Measure each sample and record the dimensions to the nearest 0.1 mm
4.2 Weigh each sample and record the mass to the nearest 10 mg.
4.3 Calculate the mass per unit area of each sample in grams per square meter using the following equation: M/A; where M is the mass of the sample in grams; and A is the area of the sample in square meters
4.4 Calculate the mean value for mass per unit area for the 5 samples
4.5 For results up to and equal to 1,000 g/m2, express these to the nearest 5 g/m2. For results over 1,000 g/m2, express these to the nearest 10 g/m2
5. ASSESSING TEST RESULTS
Per the contract
