RELATIVE HUMIDITY of a TESTING ROOM
Purpose of the test
This test is performed to determine the Relative Humidity in % of the testing laboratory.
Procedure
Weigh the foil and the conditioned paper sheet separately to an accuracy of 0,001 g and record the results on the form provided.
Measure and record the temperature and relative humidity in the testing room on the weighing occasion.
The relative humidity is calculated using the following formula (format for use in a spreadsheet):
(((Client paper – CL paper) – (Client foil – CL foil))/ Paper moisture factor) + Sample RH
Report the measure in g and on %.
ISO 187
Nr. of samples
The package contains a foil and paper sheet, which have been weighed by the Co-ordinating Laboratory under well-defined conditions
No special size
Levels
Level 1: 45.0÷55.0 %
Reporting
Report 20 valid results of measurements in g/m², their mean and their standard deviation. All to three significant digits.
CEPI 10.3
