Wednesday, December 11, 2019

4 - POINT SYSTEM, A WOVEN FABRIC GRADING SYSTEM


4 - POINT SYSTEM, A WOVEN FABRIC GRADING SYSTEM:


The fabric is woven by using different techniques like hand loom, power loom ( shuttle loom) , shuttle less loom. Every technology has the probability to get fabric defective. Weaver can reduce the fabric defects up to maximum extent but he can't avoid the fabric defects to be occurred during weaving. 

The weaver has full control over fabric defects to be occurring during hand loom weaving but hand loom fabric doesn't get green of defects. There are pick variation, dense mark, cracks are normally found. 

In power loom and shuttle less loom, there are many mechanical and electronic protections are used to prevent fabric defects. It is also true that there is not any full proof protection system which could reduce the fabric defects up to zero percent. 

All above described reasons make clean that woven fabric has some possible defects. Some of the fabric may be much dective and some fabric may have very less defects. Both fabrics can't be sold at equal price.

It is also very true that the fabric having minimum defects sells at maximum price, and fabric having maximum defects sells at minimum price. All these reasons necessitate a standard fabric grading system. This grading system helps to decide the actual and correct price of any fabric lot, there are many kind of grading systems are used in the different regions of the world.

4 - pont fabric grading system has world wide acceptability.  The simplicity of this system makes it more popular among other woven fabric grading systems. This system is easily applicable in the fabric manufacturing units. The important information of 4 - points system are given below:

QUANTITY ASSASSINATION FOR INSPECTION:

•  10 % fabric quantity of whole lot should be inspected.

• If the fabric lot has many colours of same fabric quality, then the inspected quantity is decided according to quantity of each shade.

• The fabric rolls having 40 penalty points per 100 square yard or 48 penalty points per 100 square meters are considered as first grade quality. The fabric rolls containing more penalty points than tolerance limit are graded as second quality fabric. The penalty points per 100 square meters are calculated as below:



DEFECTS CLASSIFICATION IN 4 - POINT SYSTEM:

The defect size and penalty points to be imposed are given in below table:


INDIVIDUAL PIECE INSPECTION SHEET:



FABRIC DEFECTS SUMMARY SHEET OF A PIECE:



FABRIC ROLLS INSPECTION SUMMFARY REPORT:



FINAL REPORT OF INSPECTED FABRIC LOT:




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