What Is Surface Resistance?
Surface resistance tests are a group measuring a furniture surface's resistance to effects encountered in daily use. Resistance to cold liquids (EN 12720), moist heat (EN 12721), dry heat (EN 12722) and scratching (EN 15186) are each applied separately and rated on their own scale.
Purpose of Surface Resistance
The purpose is to determine whether the surface keeps its appearance against real-use effects such as coffee, alcohol, a hot plate or a scratch. Most furniture complaints are surface-related, not structural.
Which Products Is Surface Resistance Applied To?
- Laminate, MDF-laminate and veneered surfaces
- Kitchen worktops and cabinet doors
- Table tops
- Painted and varnished wood surfaces
- Office furniture surfaces
In Which Sectors Is Surface Resistance Used?
Standards Related to Surface Resistance
- TS EN 12720 (resistance to cold liquids)
- TS EN 12721 (resistance to wet heat)
- TS EN 12722 (resistance to dry heat)
- TS EN 15186 (resistance to scratching)
- TS EN 16094 (micro-scratching of laminate surfaces)
- TS EN 14749 (storage furniture — surface requirements)
Surface Resistance Conditions
- Liquid list
- Liquids defined in EN 12720; the specification may request additional liquids
- Contact time
- Durations defined in the standard; applied in stages
- Temperature
- Temperature stages defined in the standard for heat tests
- Assessment
- Rating from 5 (no change) to 1 (severe change)
Equipment for Surface Resistance
- Liquid resistance test dishes and filter paper
- Heat resistance test blocks and temperature control system
- Scratch resistance tester (diamond tip)
- Standard-illumination assessment booth
Sample Requirements for Surface Resistance
- Flat panel specimens with the same surface as the product
- Specimen size is determined by the number of tests
- Edge banding and joints may be assessed separately
- Surface treatment and coating type must be provided
Duration of Surface Resistance
Liquid resistance tests take several days because of the contact time and subsequent recovery period. Heat and scratch tests are shorter.
Surface Resistance Procedure
- 1The specimen is cleaned and conditioned.
- 2In the liquid resistance test, discs soaked in the defined liquids are placed on the surface and covered.
- 3They are removed after the defined time, the surface is cleaned, and it is left to recover.
- 4In heat tests, heated blocks are applied to the surface for the defined time.
- 5In the scratch test, a diamond tip is drawn across the surface under increasing load.
- 6Changes are rated under standard illumination.
Surface Resistance Acceptance Criteria
The acceptance criterion is the minimum rating in the product standard or specification. Product standards such as EN 14749 require different ratings depending on the area of use; the test standard defines only the method and scale.
Evaluation of Results
Each liquid and each temperature stage is reported separately. Because the assessment is visual, standard illumination and multiple assessors are used; a glossy surface can make assessment harder, and this is noted in the report.
Surface Resistance Report
- Specimen identification and surface treatment
- Standards applied and liquid/temperature list
- Rating for each effect
- Assessment conditions
- Photographs
Accreditation
EUROLAB holds internationally recognised accreditation obtained from accreditation bodies party to the IAF and ILAC multilateral recognition arrangements, under ISO/IEC 17025 for laboratory testing, ISO/IEC 17020 for inspection and surveillance, and ISO/IEC 17021-1 and ISO/IEC 17065 for system and product certification. This chain ensures the reports and certificates issued are accepted worldwide.
Whether this test can be offered within accredited scope depends on your product and the standard applied; since accreditation is method-based, the scope is confirmed in writing at the quotation stage.
Scope and authorisationsRelated Regulations
- EU 2001/95/EC General Product Safety Directive
- Regulation on the General Safety of Products
- Requirements of product standards such as EN 12520 / EN 1730
Mobilya Testleri — What Does This Testing Field Cover?
The section below describes the field that the Surface Resistance test belongs to; the conditions and acceptance criteria of this particular test are given in the sections above. The scope specific to your product is confirmed in writing at the quotation stage.
Furniture testing shows that a product stays safe and functional throughout its expected service life. Tests are run with loading cycles representing real use: sitting, leaning back, opening and closing drawers, loading doors, loading shelves and tipping.
The logic of the field rests on the NUMBER OF CYCLES. Sitting on a chair once shows nothing; repeating it tens of thousands of times reveals structural weaknesses. Furniture tests therefore combine static loading with fatigue cycles and define different levels according to intensity of use: domestic use, commercial use and heavy commercial use mean different cycle counts for the same product.
TIP-OVER SAFETY carries particular weight in this family. Because storage furniture tipping onto a child has caused serious injuries and deaths, product standards define separate tests for it: loading with drawers open, hanging from a door and climbing scenarios are simulated. In the United States this subject has become a legislative heading of its own and has produced a mandatory specification.
The second axis is chemical and concerns indoor air quality. Formaldehyde release from wood-based panels and volatile organic compound emissions from coatings and textile components are measured. For formaldehyde, a restriction regulation applies on the EU side and CARB Phase 2 and TSCA Title VI limits in North America; these limits differ and export requires assessment against the destination market.
The third axis is flammability. In upholstered furniture the filling material and the upholstery fabric are assessed together; real ignition sources such as a cigarette and a match flame are simulated. The United Kingdom has historically applied the strictest national regime on this subject.
Surface durability is the fourth axis: abrasion, scratching, stain resistance, heat and moisture resistance, light fastness. These tests show how well the product will keep its appearance and shape commercial expectations particularly for kitchen and office furniture.
There is NO sector-specific CE regime for consumer furniture; safety is demonstrated under the general product safety framework using EN durability standards. For furniture permanently fixed into a structure, construction products legislation may come into play. This distinction matters in project work: a kitchen cabinet and a built-in system fabricated in place can fall under different regimes.
Method groups in this field
Seating
Seat and back loading cycles, arm strength, drop test, tipping resistance, leg and joint strength.
Tables and work surfaces
Static and cyclic loading, horizontal strength, tipping, surface durability.
Storage furniture
Shelf and door loading, drawer cycles, tip-over safety and climbing scenarios.
Beds and mattresses
Durability cycles, edge strength, loss of thickness after loading.
Emissions
Formaldehyde release (chamber, perforator and gas analysis methods), VOC emission test chamber measurements.
Surface and flammability
Abrasion, scratching, staining, heat and moisture resistance; ignitability in upholstered furniture.
Commonly confused in this field
- A result obtained for domestic use does not support a claim of commercial use; the cycle counts and levels are different.
- Tip-over safety is a separate test; passing the durability cycles does not demonstrate tip-over safety.
- Formaldehyde limits differ by market; EU compliance does not mean CARB/TSCA compliance.
- Flammability in upholstered furniture is valid for the COMBINATION of fabric and filling; a change of fabric requires reassessment.
- A result obtained on one model does not cover the whole range; differences in size, material and joints may require separate assessment.
Which decisions these results support
- Determining the durability class for commercial and domestic use
- Tip-over safety and child safety conformity
- Compliance with formaldehyde and VOC emission limits
- Meeting tender and project specification requirements
- Determining destination market requirements for export
Related Tests
Frequently Asked Questions About Surface Resistance
Which liquids are tested?
EN 12720 gives a defined list of liquids; everyday substances such as water, ethanol, coffee, acetic acid and oil are among them. If your specification requires additional liquids such as disinfectant, they are added to the list.
Can I send finished furniture instead of a specimen?
You can, but the tests leave a permanent mark on the surface and the product becomes unsellable. A panel specimen with the same surface treatment is both more economical and allows more tests to be run.