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Ophthalmic optics. Information interchange for ophthalmic optical equipment.

Ophthalmic optics — Information interchange for ophthalmic optical equipment

Plastics — Determination of the viscosity of polymers in dilute solution using capillary viscometers — Part 4…

Overview ISO 1628-4:1999 specifies a standardized method for determining the viscosity number (VN) and relative viscosity of polycarbonate (PC) moulding and extrusion materials in dilute solution usi…