Imitation of patterns
2. Pattern imitation: The work of making a product maintain the characteristics of the sample pattern in appearance is called pattern imitation. Flower patterns are generally characterized by size and shape. The main methods of flower pattern imitation include transplantation method, box adjustment method, flower pattern adjustment method and comprehensive adjustment method. (1) Transplantation method: Under the condition that the warp and weft densities of the sample and the product are similar, the pattern characteristics of the sample are copied to the product, that is, the transplantation method. Example 13 The product is 14.5tex×14.5tex, 472 strands/10cm×267 strands/10cm combed poplin, the sample is 13tex×13tex, 440.5 strands/10cm×283 strands/10cm polyester/cotton poplin, product and sample The warp and weft densities are similar and can be imitated using the transplantation method. When imitating, it is only necessary to carry out tissue analysis of the attached pattern, along with the corresponding harness threading, box threading methods and pattern drawings, so that the pattern characteristics of the sample can be transplanted into the product. The transplantation method is simple and easy to do, but the flower pattern after imitation will be slightly different. (2) Adjusting the foil threading method: When the warp density of the sample and the product are very different, but the weft density is close, the foil threading method of adjusting the flower area and ground area can be used to imitate the sample pattern. The purpose of adjusting the box-wearing method is to make the warp density of the product flower area close to the warp density of the sample flower area, so as to achieve the purpose of pattern imitation. The specific imitation steps are as follows. ① Carry out tissue analysis on the flower pattern of the sample. ⑦Measure the width of the flower area and calculate the density of the sample flower area. Sample flower area density = number of flower area roots/flower area width. ⑦ According to the organizational characteristics of the sample pattern, and with reference to the box threading method of similar patterns in actual production, determine the number of threads per box for the flower area and region of the product. ④ Check the effect of pattern imitation with reference to the aforementioned equation method. ⑤ In order to grasp the effect of pattern imitation and prevent accidents, the pattern must be verified. That is to say, on the premise that it does not affect the imitation effect, choose a flower box threading method that is conducive to each finishing process. The imitation pattern difference rate indicates the degree of change in pattern between the product and the sample. The calculation formula is: The imitation pattern difference rate has positive and negative values. A positive value means that the pattern of the product is larger than that of the sample, and a negative value means that the pattern of the product is larger than that of the sample. become smaller. The adjustment method of forehead piercing cannot be applied to the imitation of various types of flowers such as all-over flowers and similar all-over flowers. (3) Adjusting the flower sutra method: The method of appropriately changing the flower sutra in the sample pattern to achieve the purpose of imitation is called the method of adjusting the flower sutra. This method is only suitable for samples with larger flower shapes and more than 2 flower warps in parallel for flower pattern imitation. The steps for imitation are as follows. ⑦ Carry out tissue analysis on the samples. ② Calculate the ratio between the flower and ground density of the product and sample. ③Make appropriate adjustments to the floral sutra based on the obtained ratio and the organizational structure of the flower pattern. (4) Comprehensive adjustment method: When the warp and weft densities of the product and the sample are very different, the boxing adjustment method and the flower warp adjustment method are comprehensively used to maintain the width of the sample pattern during imitation. The length of the sample flower pattern is maintained by using the method of pattern tissue points. This method of imitating flower patterns is referred to as the comprehensive adjustment method.
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