ASTM D() Standard Test Methods for Visually Inspecting and Grading Fabrics Scope These test methods describe a procedure to. Four-Point System: Four-Point System, a standard established under ASTM D – 07(), is a standardized Test Methods for fabric. Home; ASTM D(). standard by ASTM International, 07/ 15/ View all product details ASTM D(). March
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Four-Point System is widest acceptance in fabric inspection due to its practical, impartial, and worldwide recognized. To use this system someone have to know following things: Fabric is inspected to determine its acceptability from a quality view point.
There are various fabric inspection systems such as. No more than 4 penalty points is assigned for any single flaw. A defect can be measured either length or width direction; the system remains the same. Only major errors are considered. No penalty points are assigned to minor defects. Whenever errors are recognized during fabric inspection under 4 points system and defect must be assigned a number of points depending on the severity or length.
Fabric Inspection | Four Point System | Textile Study Center
Only major defects are taking into account. A serious defect is any defect that would cause asttm final garment to be considered a second.
No penalty points are recorded or assigned for minor defects. Only major defects are considered. Calculation of total points per yards.
FABRIC INSPECTION
Many used to say that up to 40 points per square yards is acceptable. In the apparel and textile industry, textile mills, apparel brands and buyers set their own standards for acceptable points. A standards level is set by ASTM. Again grading is done based number of penalty points aatm square yards. One more thing you should remember that acceptable points can be defined as points per linear yards as well as points per square yards.
Secondly, acceptable points for individual roll and acceptable average points of all roll are set at different level. A fabric roll yards d5430-39 and 46 inch wide contains following defects. So, defect is acceptable. Check sheet or Inspection Format. To record or to collects defects during inspection a simple check sheet must b used. A check sheet includes general details, details of fabric lot, fabric defects according their sizes, summary of fabric defects, quantity inspected and total penalty points and result of the fabric lot after inspection.
Use tally marking for recording of number of defects. A sample 4 point system fabric inspection format has been attached at the bottom. Types of defects found in fabric. Fabric checker should know common defects found in fabrics and he must recognize defects on the fabric at the time of fabric inspection.
Some fabric defects are given below:.
The Quality Inspector may include any other defect which he feels are of a major category and may forward such defect details to the customer for feed back as and when required. This width is excluding selvedge.
Fabric Inspection | Four Point System
Fabric width will be checked minimum of three times during the inspection of a piece beginning, middle and end of a piece. Pieces having a width of measurement of less than the specified purchased width shall be graded as second quality. Following defects will be penalized penalty points as per rules: Following defects are cut table and will be rejected: Powered by Facebook Comments. Progressive Bundle System April 7, Md.
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Major woven fabric defects. Major knitted fabric defects.
Major dye or printing defects.