標準號：ISO 5350-4-2006
中文標準名稱：紙漿.污物和碎片的估計.第4部分:用等值黑色面積(EBA)法以反射燈檢驗儀器
英文標準名稱：Pulps - Estimation of dirt and shives - Part 4: Instrumental inspection by reflected light using Equivalent Black Area (EBA) method
標準類型：Y31
發(fā)布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：Y31
國際標準分類號：85.040
引用標準：ISO 3688;ISO 5269-1;ISO 5269-2;ISO 7213
適用范圍：This part of ISO 5350 specifies a method using instrumental inspection by reflected light for the estimation of visible dirt and shives in pulp manufactured in sheets, in terms of Equivalent Black Area (EBA) of dirt specks within the physical area range of 0,02 mm2 to 3,0 mm2. Using the algorithm prescribed in this part of ISO 5350, the maximum dirt size is limited to 3,0 mm2. Extension to other speck sizes (for example, those greater than 3,0 mm2 in physical area) may require changes in equipment, calculation procedures, or both, and is not covered in this part of ISO 5350. This part of ISO 5350 cannot be used for physical area measurements, since it may not correctly measure the dirt specks for that mode of measurement.The specimen to be evaluated should have a brightness, as determined by ISO 3688, of 30 % or greater. It may be necessary to reform some pulp sheets into laboratory sheets, if the surface is too rough or textured.This part of ISO 5350 is also intended for recycled pulp.