Relationship between shape and use
Shape distortion may result from incorrect pattern matching, unsuitable storage, excessive heat or tensioning the cup during sewing. This definition explains not only the appearance of the component but also its function within the garment. Suitability should be assessed according to the intended style, material and application method.
A size label alone is not sufficient when selecting cups and moulded cups. The breast base, cup depth, upper-edge opening, outer-fabric stretch and garment construction must be considered together. The same size name may not produce the same fit in different patterns; testing on the actual style is therefore necessary. This must be assessed separately for “Why does bra cup shape distortion occur?”
Points to consider when selecting a model
On the sample, the cup base line is compared with the pattern; the upper edge is checked for gaping, distortion or tension in the outer fabric. The right and left pieces must have the same shape and must not be crushed during storage or sewing. A change of fabric or pattern may require the cup selection to be retested. Criteria for bra cup shape distortion are determined before sampling.
When assessing why bra cup shape distortion occurs, the expectation in the finished product is first defined in writing. It should be stated whether the component is intended to be visible or only to provide internal support, and which fabric and pattern will be used. Measurements on the sample should not be judged only on a flat table; the sewn garment must also be examined.
From sample to bulk production
A clear technical specification should be prepared before ordering with regard to bra cup shape distortion. The end use, pattern, main fabric and expected shape are shared, while unclear points are tested on the sample. Using the same reference throughout bulk production after approval reduces differences in interpretation between teams.
If the pattern or main fabric changes after the decision regarding bra cup shape distortion has been approved, the previous result should not be considered valid. A seemingly small difference in fabric thickness or stretch may alter the appearance of the intermediate component. The change should be reviewed again through a short application sample before bulk production.
The result of testing for why bra cup shape distortion occurs should be recorded in brief, measurable notes. Rather than a general statement such as “suitable,” the fabric, pattern and application direction for which approval was given should be stated. This record reduces the risk of selecting the wrong product or a different application for repeat orders.