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The powered roll gin stand is a new saw-type ginning technology that has undergone numerous studies evaluating its use for ginning seed cotton. Past results have shown increased production and turnout without adversely affecting fiber properties. In some cases, improvements in fiber properties over a conventional gin stand were demonstrated. This article reports High Volume Instrument and Advanced Fiber Information System fiber property results from three field tests evaluating the technology on three different makes of gin stands. Results indicate the powered roll gin stand performed equal to or better than some of the conventional gin stands in processing rate, lint turnout, and/or some fiber properties. However, work remains to refine the technology so that it performs consistently on different makes of gin stands.

Material which had accumulated on the inner surface of gin roll boxes during the ginning of immature bolls has been collected and subjected to chemical analysis. This deposit material, which was a dried, hard, dark-brown substance, has been shown to be about 25% protein and 8% lipid, the remainder being fuzz fibers, lint, and seed-coat fragments. The protein had an amino acid composition similar to the protein of cottonseed and the lipid was composed of cotton wax and cottonseed oil. It was suggested that the deposit material originates from immature cottonseed and it may be the same as material that causes saw tooth clogging, which can occur when early season machine-stripped cotton is ginned.

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