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Cap backing is used to improve the crispness of lettering and columns. This is particularly so with low profile and unstructured caps. There are several other less obvious production benefits in using cap backing. Backing keeps up the tension on the bobbin thread. This allows the embroiderer to switch from flats to hats and back again without touching the machine settings. The use of this backing can prevent cap fabric and fiber from being forced down the throat of the machine. An extra fold of backing can be used to get a firm seating on rotating cap frames to prevent registration slips.
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