This part of En ISO 5350 specifies the method for the estimation by transmitted light of dirt and shives in pulp manufactured in sheets. It does not apply to unbleached kraft pulps or to any other sheeted pulps that are too opaque to allow for the estimation of the minimum size or for minimum contrast specks to be counted in accordance with this European Standard. The maximum grammage for most pulp sheets is in the range 800 g/m2 to 1000 g/m2. Part 1 of this European Standard deals with the estimation of dirt and shives in all kinds of pulp. It is based on inspection of laboratory sheets.