RR Lab | Defect Analysis

Defect Analysis

We offer specialized services in defect analysis. We analyze defects like holes in fabric, Dyeing related problems, Dia and Gauge Analysis and give remedies for all of the defects.

Defect analysis helps one to understand the reasons for not achieving the right quality.

At RR Lab, defect analysis department leverages with physical, chemical, polymer labs and Technical services Department. Here, we analyze the defects regarding all types of fibers, yarns and fabrics. This includes all types of warp and weft lines, all type of stains, poor mechanical properties, shade variation, colour fastness to wash, light and rubbing and many more.

Visual analysis and defect determination
Visual determination of weave process.
Determine filament count
Measures the tightness and looseness of a yarn within a knitted fabric.
Determines if defects in a fabric such as streaks and barre are caused by physical or dye defects.
Supplemental dye lab procedure for defect determination.
Separate normal and defect for woven and knit

Fault Description	Causes	Solutions
vertical stripes	Defective needles or sinkers	Needles and sinkers change after long time use. Checking needle detectors Use of fabric fault detector
Fabric sprirality Distortion of plain knitted fabric. Wales are not perpendicular to courses	Yarn teist too high Number of feeder too high Bad combination between yarn twist direction and machine rotation direction	Control of yarn teist (yarn twist should never be above 700 tr/m). Reduction of feeders number. use of Z-Twist yarn with machine having needles watch rotation direction and vice versa. Appropriate finishing reduces fabric sorirality
Dropped Stitches Local column of dropped stitches obtained when presented yarn is occasionally unhooked by needles.	Yarn-guide not properly set. Defective needle latch. Yarn tension is not sufficient or too long stitches. Take-down too high. Cylinder-dial distance too high. Wrong yarn threading	Precise yarn-guide restting. Needle chande. Yarn Consumption and couliering readjustment. Take-down readjustment. Dial position readjustment. Yarn thewding theough the righ bore. Use of fabroc fault detctor. 8. This fault detector