In addition to adding melamine filler, fabric engineers also learned to further stabilize and refine the fabric by passing it through additional baths of other resins in what is called "finishing." Different resins are used for different fabrics. For example an acrylic finish is used for Dacron and a polyurethane fin

Dacron fabric is passed through a trough of melamine resin to fill the gaps between the yarns and prevent bias stretch.
At the end of the process giant rollers apply tremendous pressure on the woven fabric to flatten and further tighten the weave.

In an effort to improve Dacron, Hood Sailmakers began manufacturing narrow panel fabric seen here in this classic ketch.

ish for nylon. As the fabric comes out of the bath it is squeezed between a roller and a sharp steel blade that both forces the resin into any gaps or indents in the fabric and removes the excess. This part of the process is known as "yarn-tempering," and the final result is a smooth finish that ensures the fabric is non-porous and even more stable.

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