Standard input-output norms require specified polyester inputs and testing certification for dyed polyester exports under SION.

Standard Input-Output Norms for dyed polyester fabrics/sarees (SION J327) prescribe grey polyester fabric at 1.13 kg per kg of polyester content and relevant dyes at 2% of polyester content. Exporters must provide grey and processed fabric samples to Customs with a Certificate from an approved textile testing laboratory to verify input proportions and confirm imported goods are those used in the export product.

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