4分制布料检验英文版.doc

This lesson is to introduce the knowledge of the fabric inspection.A. The method of penalty scoresNormally we will not use the AQL to assess the quality of fabric, we use the 4 point system to score the defects on fabric for fabric inspection.The 4 point system provided a means of defining the defects according to the severity by assigning demerits and penalty points. All fabrics including the grey and finished, woven and knitting, can be grading by this system. Visible defects were scored in proportion to the size of the defects.Penalty point, Defects in any direction, with the exception of specify, are scored as followings: Defects size Penalty points Defects≤3 inches 1 3inches＜Defects≤6inches 2 6inches＜Defects≤9inches 3 Defects＞9inches 4 Note: No single Yard or single defects can be scored more than 4 points;Defects like holes, netting, dropped stitches, laddering and torn selvage are scored 4 points regardless of the defects size;B. The sampling sizeIf not specified, the sampling size will follow below: Lot size Sampling size ＜1000yards Full sample 1000yards to 10000yards 1000yards ; 10000yards (Square root of lot size) X 10 C. Acceptable points by fabric groups-- Woven fabric: Group Fabric Description Individual rolls For sample size 1 All synthetic – polyester—acetate-nylonDressing skirting ;Filament RayonWorsted Spun ;Silk/Silk blends ; 20points/100 square yards 16points/100 square yards 2 Basic Denim/cotton TwillCotton canvas/plainCotton poplin/ oxford Gingham ShirtingSpun rayon Woolen spunCotton chambray/Indigo yarn dyedAll jacquard/dobby/ PrintedCorduroy/ velvetStretched denim/corduroy/wovenCotton/synthetic blends ; 28points/100 square yards 20points/100 square yards 3 Linen blendsRamie BlendsMuslin 40points/100 square yards 32points/100 square yards 4 Duopioni silk/Light weight silkPatch work 50points/100 square yards 40points/100 square yards -- Knitting Fabric: Group Fabric Description Individual ro