Insignia cloth was used to make the skull and crossbones on the sail as well as the racing stripes on the deck.photographs by the authors

Insignia cloth was used to make the skull and crossbones on the sail as well as the racing stripes on the deck.

We once decided to put a skull and crossbones on a black lateen sail for a Sunfish and, rather than take on the very awkward task running it through the sewing machine, we used adhesive-backed insignia sailcloth. The material was easy to use, and it has held up well in the marine environment and harsh sunlight of Florida.Adhesive-backed sailcloth is commonly used for numbers and class insignia on sails. It comes in several colors, and we used Challenge brand, purchased from Sailrite. The lightweight 3.3-oz polyester fabric ensures that the insignia does not interfere with the shape and pliability of the sail. There is a heavier fabric available from Contender that has additional UV treatment and weighs about a half ounce more than regular insignia sailcloth; it comes only in white and is well suited for repairing sails. The peel-off paper backing on Challenge cloth has a grid to aid in tracing out insignias and numbers.

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