12. Keywords
Stickies, Impurities, Reclaimed fibers, Corrugated containers, Mixed waste papers, Pulps, Screening, Image analysis
13. Additional information 13.1 Effective date of issue: May 6, 1999. 13.2 Required sample size 13.2.1 Fig. 1 reveals the required sample size (g) o.d. as a function of the anticipated stickies area (mm2/g). The chart is based on statistics and paper mill/pilot plant data. 13.2.2 Fig. 2 is solely based on statistics. This chart reveals the required sample size (g) o.d. as a function of the anticipated number of stickies (1/kg). 13.2.3 Applying Fig. 2 will ensure that with an 80% probability, the test results will fall within 20% of the true stickies number. 13.3 Statistical fundamentals 13.3.1 For a desired 80% probability and a sample size larger than 100 g the mean stickies number of the complete sample population will fall in the following confidence interval