What Is ASTM D6736 Latex Paint Burnish Resistance?
ASTM D6736 is a standard test method for evaluating the burnish resistance of latex paint films. Burnishing refers to the undesirable increase in gloss that occurs when a painted surface is rubbed or scrubbed, particularly common with flat and low-sheen interior latex paints. This aesthetic defect reduces the visual uniformity of painted surfaces in areas of frequent contact.
Burnish resistance is a key performance criterion for interior architectural latex paints used in high-traffic areas such as corridors, kitchens, and commercial spaces. ASTM D6736 provides a controlled, reproducible method to evaluate and compare paint formulations for their resistance to gloss increase under mechanical rubbing.
Applications and Benefits of ASTM D6736 Latex Paint Burnish Resistance Testing
Scope
ASTM D6736 evaluates:
- Gloss increase (burnish) of applied latex paint films after mechanical rubbing
- Comparison of burnish resistance between paint formulations
- Performance at defined film thickness and substrate conditions
- Applicability to flat, eggshell, and low-sheen interior latex paints
Applications
- Interior architectural latex paint development
- Paint quality control for flat and low-sheen products
- Comparative evaluation of competitive paint brands
- OEM specification compliance for commercial coatings
- High-traffic and institutional building paint qualification
Benefits
- Provides a standardized, reproducible burnish evaluation
- Enables differentiation between burnish-resistant formulations
- Supports marketing claims for scrub and burnish resistance
- Identifies formulation weaknesses early in development
- Reduces field complaints and repainting costs
Our ASTM D6736 Testing Procedure
Panel Preparation
Latex paint is applied at specified wet film thickness to a standard substrate and allowed to cure under controlled conditions.
1Initial Gloss Measurement
Gloss of the cured paint film is measured at 60° and 85° geometry using a calibrated glossmeter before rubbing.
2Mechanical Rubbing
The cured panel is scrubbed with a standard abrasive pad under set load and strokes in a washability tester.
3Post-Rub Gloss Measurement
Gloss is re-measured in the rubbed area; burnish value is calculated as the gloss increase (ΔGloss) compared to the unrubbed area.
4ASTM D6736 Test Parameters and Requirements
| Parameter | Details |
|---|---|
| Standard | ASTM D6736 |
| Applicable Materials | Interior latex paint films (flat, eggshell, low-sheen) |
| Measurement | Specular gloss at 60° and 85° |
| Rubbing Apparatus | Washability scrub machine with defined pad and load |
| Burnish Index | ΔGloss units (rubbed minus unrubbed) |
- Calibrated specular glossmeter (60° and 85° geometry)
- Washability/scrub machine with defined stroke and load parameters
- Standard abrasive or burnishing pad
- Film applicator (bird applicator or drawdown bar)
- Standard test substrate panels
- Conditioning chamber for paint film cure
Equipment and Instrumentation Used for ASTM D6736 Testing
What You Receive: Test Report, Data, and Certification
- Initial gloss (60° and 85°) values
- Post-rub gloss values in burnished area
- Burnish index (ΔGloss)
- Comparative burnish resistance ranking of formulations
- Quality control and product development documentation
ASTM D6736 Latex Paint Burnish Resistance FAQs
Burnishing occurs when mechanical rubbing compresses and partially smooths the microscopic surface texture of a flat paint film, locally increasing specular reflectance and making the rubbed area appear glossier than surrounding areas.
In high-traffic areas where walls are frequently touched, wiped, or rubbed, burnishing creates visible glossy marks that compromise the uniform appearance of flat and matte finish paints.
Both 60° and 85° (near-grazing) angles are used. The 85° measurement is particularly sensitive to texture and surface roughness changes and is more representative of the visual burnish effect as seen from typical viewing angles.
Optimizing pigment volume concentration (PVC), selecting appropriate binders, using flatting agents, and incorporating specific matting pigments can improve burnish resistance while maintaining low sheen appearance.
No. Scrub resistance measures how well a paint withstands film erosion or removal under wet abrasion, while burnish resistance measures resistance to gloss increase under dry or semi-dry rubbing. Both are important performance attributes for interior paints.
Burnish resistance additives improve a paint coating's ability to resist changes in surface gloss caused by repeated rubbing or contact. They work by modifying the coating's surface properties, hardness, and resistance to mechanical polishing. Their effectiveness depends on the paint formulation, including pigment characteristics and binder properties. ASTM D6736 provides a method for evaluating the resulting burnish resistance of latex paints under dry conditions.
ASTM D6736 measures the ability of latex paints to resist an increase in gloss caused by rubbing. A paint film is applied to a test panel and allowed to dry under controlled conditions. Initial gloss readings are recorded before the panel is subjected to repeated rubbing using an automated washability machine. Final gloss readings are then compared with the initial values to determine the degree of burnishing. A smaller increase in gloss indicates better burnish resistance.
Burnish-resistant paint testing under ASTM D6736 evaluates how well latex paint maintains its original appearance when exposed to repeated dry rubbing. The paint is applied to a test panel, dried, and measured using a gloss meter. The panel is then rubbed under controlled conditions using an automated testing machine, and gloss measurements are repeated. The change in gloss helps determine the coating's resistance to polishing, supporting paint formulation development and quality control.
Why Choose Infinita Lab for Latex Paint Burnish Resistance Testing
When your Latex Paint Burnish Resistance results have to hold up - for compliance, a customer audit, or an engineering decision - ASTM D6736 accuracy and an unbiased third-party report matter more than price. Infinita Lab routes your ASTM D6736 latex paint burnish resistance testing to ISO/IEC 17025-accredited U.S. partner labs with hands-on method experience, so you get defensible data, transparent reporting, and turnaround times built around your project deadline - not ours.
Looking for an Accredited Partner for ASTM D6736 Latex Paint Burnish Resistance Testing?
Send query us at hello@infinitalab.com or call us at (888) 878-3090 to learn more about our services and how we can support you.
