Understanding Scratch-Dig Specification: Surface Quality for Optical Glass

April 2026•7 min read

MIL-PRF-13830B Scratch-Dig Standard

Surface quality directly impacts display performance and user experience. This guide explains the MIL-PRF-13830B scratch-dig standard (80/50, 60/40, 40/20, 20/10), visual vs. instrumental inspection methods, acceptable defect sizes for display cover glass, and how Jinzhijing Glass controls surface quality through inspection processes.

Common Scratch-Dig Grades

• 80/50: General purpose commercial displays
• 60/40: Standard industrial displays
• 40/20: High-quality medical and marine displays
• 20/10: Precision optical and aerospace applications

Inspection & Quality Control

Jinzhijing Glass employs both visual inspection under controlled lighting conditions and automated optical inspection systems to ensure every piece of glass meets the specified scratch-dig requirements before shipment.

Marine Display Glass Requirements

Read Article →

Need Quality Standard Consultation?

Our engineers are ready to answer your surface quality specification questions

Consult Engineer Contact Sales