ASTM D6279 High-Gloss Coating Rub Abrasion Mar Resistance Testing | Infinita Lab
ASTM D6279-15 test method is used to determine the relative mar resistance of a series of high gloss coatings applied to a flat, rigid surface. Two methods, Wet rub and dry rub are used to fully characterize a coating’s mar resistance.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
Overview
ASTM D6279-15 is a standardized test method used to determine the mar resistance of high-gloss coatings on products such as automobiles, boats, and toys. The coatings are subjected to conditions that may affect their surface appearance during manufacturing.
This test predicts the coating’s resistance to surface marring by measuring the gloss retention of the abraded and unabraded surfaces. The resistance of a layer to mar is directly related to its ability to maintain gloss after abrasion.
Scope, Applications, and Benefits
Scope
ASTM D6279-15 evaluates:
- Resistance of high gloss coatings to surface marring
- Gloss retention after dry and wet abrasion
- Performance comparison between different coating systems
- Effect of abrasion on coating appearance
- Surface durability under simulated service conditions
The method applies to uniformly coated test panels with controlled surface texture.
Applications
- Automotive exterior and interior coatings
- Marine coatings for boats and yachts
- Consumer product finishes (toys, appliances)
- Coating formulation development
- Quality control testing
- Research and development
- Performance benchmarking
Benefits
- Quantitative measurement of mar resistance
- Predicts long-term appearance durability
- Enables coating performance comparison
- Supports product design decisions
- Improves coating formulation quality
- Standardized and repeatable methodology
- Enhances customer satisfaction through durability testing
Test Process
Panel Preparation & Curing
The coating is applied uniformly, and the panels are dried or cured under controlled conditions.
1Abrasion Treatment
Panels are marred using dry media, wet media, or both over a defined area.
2Control Selection & Gloss Measurement
An unabraded area is retained; gloss is measured on both the unabraded and the glossed areas.
3Mar Resistance Calculation
Percent gloss retention is calculated to determine mar resistance.
4Technical Specifications
| Parameter | Details |
|---|---|
| Applicable Materials | High gloss coatings |
| Specimen Size | 101.6 × 152.4 mm (4 × 6 in.) |
| Optional Panel Size | 101.6 × 304.8 mm (4 × 12 in.) |
| Number of Specimens | Minimum two panels per coating |
| Recommended Colour | Black coatings for consistency |
| Measurement Output | Percent gloss retention |
| Measured Property | Mar resistance |
Instrumentation Used for Testing
- Gloss meter
- Abrasion testing apparatus
- Coating application tools
- Drying/curing chamber
- Sample holding fixtures
- Measuring templates
- Data analysis software
Results and Deliverables
- Percent gloss retention values
- Mar resistance ratings
- Comparative coating performance data
- Test reports for quality control
- Appearance durability assessment
Frequently Asked Questions
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