The Bureau of Indian Standards (BIS), under the Department of Consumer Affairs, has notified the revision of the Indian Standard IS 13360 (Part 9/Sec 9) concerning the testing of yellow index in plastics, as per Rule 15(1) of the BIS Rules, 2018.
The revised standard — now aligned with international standard ISO 17223:2014 — was officially established on 09 June 2025, and the previous version will be withdrawn on 09 December 2025.
📌 Key Highlights:
- Standard Revised: IS 13360 (Part 9/Sec 9) updated for testing optical properties of plastics.
- New Title: Plastics — Methods of Testing: Determination of Yellow Index and Change in Yellowness Index.
- Old Version Withdrawn: IS 13360 (Part 9/Sec 9): 2001 to be withdrawn after 6-month transition.
- Alignment with ISO: The revised standard now complies with ISO 17223:2014, ensuring global consistency in test methods.
📊 Comparison Table:
| Sl. No. | Revised Standard | Title & Details | Withdrawn Standard | Withdrawal Date |
| 1 | IS 13360 (Part 9/Sec 9) : 2025 (ISO 17223:2014) | Plastics — Methods of Testing: Determination of Yellow Index and Change in Yellowness Index (1st Rev.) | IS 13360 (Part 9/Sec 9): 2001 | 09 Dec 2025 |
🏭 What This Means for Industry:
Manufacturers, researchers, and testing labs in the plastics and polymer industry must shift to the updated test method to maintain compliance and improve accuracy in measuring yellowing — a critical quality parameter in optical plastics.
