The types of weaving yarns include the following:

1. Pure spinning: A yarn made from a type of fiber material, such as cotton yarn, wool yarn, hemp yarn, and silk yarn. This type of yarn is suitable for making pure textiles.

2. Blended yarn: A yarn spun by mixing two or more fibers, such as polyester and cotton blended yarn, wool and viscose blended yarn, etc. This type of yarn is used to highlight the advantages of two types of fibers.

3. Variable mixed yarn: yarn with different fiber components or fibers of different colors and characteristics that exhibit a gradual or abrupt distribution in the yarn body, such as gradient yarn, bamboo yarn, etc.

4. Combination or composite yarn: A yarn composed of short fibers and short fibers, short fibers and long filaments, long filaments and long filaments, fiber bundles and yarns, etc., such as core spun yarn, wrapped yarn, etc.

The codes for weaving yarns include the following:

1. Number: Indicates the thickness of the yarn.

2. Metric count: indicates the fineness of the yarn.

3. Imperial count: indicates the fineness of the yarn.

4. Denier: Refers to the fineness of the filament.

The following are common codes for yarn:

1. J represents combed yarn;

2. T represents the warp yarn;

3. W represents weft yarn;

4. R represents twisted yarn;

5. D represents tube yarn;

6. K represents knitting yarn;

7. Q represents the yarn used for velvet production;

8. G represents burnt yarn;

9. RD stands for non glossy adhesive yarn;

10. Rb represents light adhesive yarn