Features of first-class machine-made carpets

In general, machine-made carpets are divided into five quality grades. Grade One or S carpets must possess outstanding and remarkable characteristics, with no defects or flaws. Below are several key points regarding these carpets:

1. No Cylinder Pattern Repetition: There should be no evidence of cylinder pattern repetition in the design of the machine-made carpet. In many defective carpets, due to the use of outdated and low-quality cylinder machinery, the pattern may repeat multiple times without progressing, resulting in the same design appearing repeatedly.

2. Use of High-Quality Yarn: The best machine-made carpets typically utilize heat-set yarns, which have a much higher quality compared to regular yarns. These yarns shed significantly less fiber and ensure that the texture of the carpets appears uniform and consistent.

3. Appropriate Design and Dimensions: The design used should be suitable and properly sized. Generally, the dimensions of carpets should not deviate from standard limits, with an allowable variance of ±5% for the carpet's length.

4. Adhesive Application Standards: The amount of adhesive used for machine-made carpets must adhere to specified standards. Excessive application can lead to defects and damage to the carpet's backing.

5. Pile Height Consistency: The pile height of the carpet should not vary more than 10%, as this can reduce the overall quality.

6. No Cutting Marks: There should be no signs of cutting or snags on the carpet.

7. Consistent Pile Yarn Usage: The amount of pile yarn used should not be deficient or excessive.

8. No Tears or Patches: Grade One carpets show no signs of tearing, holes, or patches.

9. No Hooking Marks on Backing: The backing of the carpets should not exhibit any hooking marks, which occur due to improper machine settings, resulting in poorly finished backing where some yarn ends are visible.

10. Proper Placement of Fringes: The fringes of the carpets must be positioned correctly. In some cases, this issue arises from inaccurate machine adjustments (the fringes should have specified length and spacing and be aligned).

11. No Double Weaving: Double weaving is a defect not found in Grade S or Grade One carpets. This occurs when a thread breaks during weaving, and the continuation is done with extra thread from the same location, causing two weaves to sit side by side.

12. Correct Shearing or Finishing: The shearing or finishing of machine-made carpets must be done correctly; otherwise, the carpet may appear striped, with varying pile heights in different areas.

13. No Gaps in the Carpet: There should be no visible gaps in the carpet, which usually happens if the pile yarn breaks and the machine continues working without addressing the issue.

14. No Color Variation: There should be no instances of two-tone or multi-tone colors, which may arise from using different shades of a single color.

15. No Fabrication Issues: If a number of yarns get stuck or jammed, a small section of the carpet may lack pile, commonly referred to as "shelf weaving," which should not occur in high-quality carpets.

16. Burn Marks: Burn marks may appear when different materials (such as wool and acrylic) are used in a single carpet, and one type of yarn is washed without considering this issue.

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