GB/T 46442-2025 Active National standards

GB/T 46442-2025 Plastics—Determination of color difference of recycled plastics

Publish Date: 2025-10-31 Implement Date: 2026-05-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 46442-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Basic standards and general methods for synthetic resins and plastics

ICS Name: Recycling

Publish Date: 2025-10-31

Implement Date: 2026-05-01

Pages: 16 pages

Scope

This document describes the method of determining the color difference of recycled plastics using a spectrophotometer under the specified International Commission on Illumination (CIE) standard light sources and photoelectric detectors.
This document is applicable to recycled plastic particles made from mechanically recycled waste thermoplastic materials, as well as sheet-shaped samples prepared from them.
Note 1: The shapes of recycled plastic particles include flat, spherical, rod-shaped, sheet-shaped, and fine-grained. Different shapes may affect the determination of color difference.
Note 2: Polyethylene terephthalate (PET) (REC) sheets can be tested using this method.
Note 3: Synthetic resins and plastics can also be tested using this method.
This document is not applicable to recycled plastics containing fluorescent agents.