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Not AvailableThe effect of natural sunlight on four polyamide monofilament yarns and four polyamide multifilament twines was studied. The samples, each of different RTex were exposed to 180 days solar radiation and sub-samples were drawn at intervals to study the effect on breaking strength and elongation at break. Significant reduction in both breaking strength (P < 0.01) and elongation at break (P < 0.01) have been recorded in the test samples due to weathering. Breaking strength reduced linearly with the period of exposure, while no such linear relationship was found in the case of elongation at break.Not Availabl