Wireless Communication
EU RED Network Security Standard EN 18031
Wireless and communication detection
Mobile communication product certification
Bluetooth BQB Product Certification
FM/AM Product Certification
WiFi Product Certification
Wireless charging product certification
Interphone product certification
Base station certification
SAR testing
Receiver Product Certification
5G NR Product Certification
UWB Product Certification
Internet of Things authentication
Electromagnetic compatibility
Automotive Electronics EMC Testing
EMC rectification
EMC
Automotive Electronics
Electrical performance testing
EMS testing - radiation anti-interference testing system (including radar waves)
EMS Testing - Electrostatic Discharge
EMS Test - Transient Conducted Immunity Test
EMS Testing - Portable Transmitter Immunity
EMS Test - High Current Injection (BCI) Test
EMS test - low-frequency magnetic field anti-interference test
EMI Testing - Transient Conducted Emissions Testing System
EMI testing - low-frequency magnetic field emission
EMI Test - Radiation Emission Test
EMI Test - Conducted Emissions Test
Automotive Electronic Testing
Automotive Parts Inspection
Automotive ELV&VOC
Reliability testing
Temperature shock test
Vibration testing
Instrument panel/instrument panel three comprehensive vibration test
Comprehensive vibration test of door inner panel III
Sunvisor Three Comprehensive Vibration Test
Spoiler Three Comprehensive Vibration Test
Three comprehensive vibration tests of car front and rear bumpers
Three comprehensive vibration tests for lamp housing/lampshade
Comprehensive vibration test of outer circumference three
Automotive metal material testing
Performance testing of automotive lighting fixtures
Rapid temperature change test
Vibration
Common issues with vibration testing
Common issues with fatigue testing
Common issues with high and low temperature testing
Conducted Interference (CE) - Suzhou Lixun Standard
Electromagnetic Radiation Tolerance Test (RS) - Suzhou LCS Standard
Electrical Fast Pulse Withstand Test (EFT) - Suzhou LCS Standard
Voltage flicker test - Suzhou LCS standard
Electronic appliances
Household appliance product testing
Electrical accessory product testing
Household appliance testing
Chemical Testing
Introduction to PFAS Testing
MOSH/MOAH Mineral Oil Testing Service
MOSH/MOAH Mineral Oil Testing and Certification Report Service
Consumer Product Testing Services - WEEE Chapter
Ecological textile testing
Leather Footwear Inspection
Food contact material testing
Testing of toys and baby products
Hazardous substance testing
Electronic Cigarette Testing
Electronic cigarette detection
Reliability testing
Other tests - pencil hardness test
Mechanical testing - Packaging compression test
Climate environment testing - Xenon lamp aging test
Battery Testing
Power storage battery testing and certification
Consumer Electronics Battery Testing and Certification
power battery
Light electric vehicle batteries
Energy storage battery
Portable battery
Battery testing
battery test
Lamp Inspection
Inspection of ship lighting fixtures
COI Index Test for Medical Indoor Lighting
Lamp safety inspection
Luminaire energy efficiency testing
EMC testing of lighting fixtures
Integral Ball Laboratory
Photobiology Experiment
Light distribution test
Lamp aging test
Lamp IP waterproof
Lamp performance testing
Lamp reliability testing
Children's toy testing
Testing standards for toy products
China Certification
China's "national promotion" RoHS certification
China Energy Efficiency Label Certification
China Energy Conservation Certification
China CQC Certification
Tmall JD Quality Inspection Report
China SRRC Certification
Taiwan BSMI certification
Taiwan NCC certification
China CCC Compulsory Certification
Asia Certification
Vietnam certification
KC certification
KUCAS Certification in Kuwait
Singapore PSB certification
Iraq COC Certification
IMDA certification
VCCI Certification in Japan
JATE certification in Japan
PSE certification
BIS certification
Japanese TELEC certification
European Certification
RoHS certification
GOST certification in Russia
Russian EAC certification
Northern Ireland UKNI logo
Electrical ENEC certification
European D-MARK certification
Türkiye BTK certification
TSE certification in Türkiye
CE certification in Türkiye
RED certification
German TUV-SUD certification
CE-ERP certification
REACH certification
German GS certification
EU E-Mark certification
North American Certification
Ecuador VOC certification
Mexico NOM certification
IRAM certification
CPSC Certification in the United States
CSA certification
ASTM certification
FDA certification
CEC certification
ETL certification
ul certification
IC certification
Energy Star
FCC Certification in the United States
ASTM certification
Middle East Certification
Israel SII certification
Saudi SABER certification
GCC certification for the seven Gulf countries
Iran COI certification
Qatar COC Certification
Iraq COC Certification
Saudi EER Energy Efficiency Certification
Saudi SABER certification
Algeria PCA certification
PVOC certification
Australia Certification
New Zealand IC-F testing
VEET certification
LCP certification
GEMS certification
RCM certification
C-Tick certification
SAA certification
Africa Certification
Gabon COC certification
Algeria COC certification
Ethiopian VOC and COC certification
Mauritius VOC certification
Ghana COC certification
COC certification in Burundi
Zambia COC certification
Botswana COC Certification
Uganda PVOC certification
SABS certification in South Africa
South African LOA certification
Zimbabwe CBCA Certification
Nigeria SONCAP certification
Kenya PVOC certification
African COC certification
Other certifications
WEEE
Bluetooth BQB certification
IECEE registration
MHRA registration in the UK
TRAINING
Management system training
Laboratory technical training
Laboratory Process Consulting
Laboratory decoration construction
Wireless Communication
Electromagnetic compatibility
Automotive Electronics
Automotive Parts Inspection
Electronic appliances
Chemical Testing
Electronic Cigarette Testing
Reliability testing
Battery Testing
Lamp Inspection
Children's toy testing
China Certification
Asia Certification
European Certification
North American Certification
Middle East Certification
Australia Certification
Africa Certification
Other certifications
TRAINING
Wireless Communication
Electromagnetic compatibility
Automotive Electronics
Automotive Parts Inspection
Electronic appliances
Chemical Testing
Electronic Cigarette Testing
Reliability testing
Battery Testing
Lamp Inspection
Children's toy testing
China Certification
Asia Certification
European Certification
North American Certification
Middle East Certification
Australia Certification
Africa Certification
Other certifications
TRAINING
Wireless Communication
Electromagnetic compatibility
Automotive Electronics
Automotive Parts Inspection
Electronic appliances
Chemical Testing
Electronic Cigarette Testing
Reliability testing
Battery Testing
Lamp Inspection
Children's toy testing
China Certification
Asia Certification
European Certification
North American Certification
Middle East Certification
Australia Certification
Africa Certification
Other certifications
TRAINING
Wireless Communication
Electromagnetic compatibility
Automotive Electronics
Automotive Parts Inspection
Electronic appliances
Chemical Testing
Electronic Cigarette Testing
Reliability testing
Battery Testing
Lamp Inspection
Children's toy testing
China Certification
Asia Certification
European Certification
North American Certification
Middle East Certification
Australia Certification
Africa Certification
Other certifications
TRAINING
Wireless Communication
Electromagnetic compatibility
Automotive Electronics
Automotive Parts Inspection
Electronic appliances
Chemical Testing
Electronic Cigarette Testing
Reliability testing
Battery Testing
Lamp Inspection
Children's toy testing
China Certification
Asia Certification
European Certification
North American Certification
Middle East Certification
Australia Certification
Africa Certification
Other certifications
TRAINING
Wireless Communication
Electromagnetic compatibility
Automotive Electronics
Automotive Parts Inspection
Electronic appliances
Chemical Testing
Electronic Cigarette Testing
Reliability testing
Battery Testing
Lamp Inspection
Children's toy testing
China Certification
Asia Certification
European Certification
North American Certification
Middle East Certification
Australia Certification
Africa Certification
Other certifications
TRAINING
Solutions
-
-
-
Automotive interior and exterior trim - Environmental testing
-
Automotive interior and exterior decorations (electronic and electrical components) - IP protection
-
Automotive electronic and electrical components - Electrical performance
-
Automotive interior and exterior trims - Mechanical performance testing
Contact Us
National 24-hour service hotline
400-116-2629
Group Headquarters
E-mail: webmaster@lcs-cert.com
Address: Shenzhen City, Baoan District, Shajing Street, Nga side of the school of Wei Juji Industrial Park, Building A 1 ~ 2 floor, Building C 3 floor
Grid test
Use a cutting tool to cut the coating onto the substrate to form a right angled grid pattern scratch, then use adhesive tape with a specified adhesive strength to adhere and tear it off, and evaluate the adhesion of the coating.
Cross Cut Test is a commonly used method for evaluating the adhesion of coatings. By cutting the coating to form a grid pattern, and then using adhesive tape to tear and observe the peeling of the coating, the adhesion of the coating can be rated. The following are the detailed steps and rating criteria for the grid test:
Test steps
Prepare samples:
Ensure that the sample surface is clean, dry, and free of oil stains.
The sample should be flat and easy to cut.
Cutting coating:
Use a cutting tool to cut a right angled mesh pattern on the surface of the coating. Usually, the grid spacing is 1mm or 2mm, depending on the coating thickness and standard requirements.
The cutting depth should reach the substrate, ensuring that the incision is clear and uniform.
Clean the grid:
Use a soft brush or compressed air to clean the mesh area and remove debris generated by cutting.
Paste adhesive tape:
Choose adhesive tape with specified adhesive strength (such as 3M tape).
Apply the adhesive tape evenly to the grid area, ensuring complete coverage and tight fit.
Use your fingers or eraser to flatten the adhesive tape and eliminate any air bubbles.
Tear off the adhesive tape:
Tear off the adhesive tape at a stable speed (within about 1 second), with an angle close to 180 °.
Observation and rating:
Observe the peeling of the coating in the grid area and evaluate it according to the rating criteria.
Rating Criteria
The rating of the grid test is usually based on the area and degree of coating detachment, and common rating criteria are as follows:
ISO 2409 standard:
Level 0: The cutting edge is completely smooth and without detachment.
Level 1: The cutting edge has slight detachment, with a detachment area of less than 5%.
Level 2: The cutting edge has some detachment, with a detachment area between 5% and 15%.
Level 3: There is significant detachment at the cutting edge, with a detachment area between 15% and 35%.
Level 4: The cutting edge has severe detachment, with a detachment area between 35% and 65%.
Level 5: The cutting edge completely falls off, with a detachment area greater than 65%.
ASTM D3359 standard:
5B: The cutting edge is completely smooth and without detachment.
4B: The cutting edge has slight detachment, with a detachment area of less than 5%.
3B: The cutting edge has some detachment, with a detachment area between 5% and 15%.
2B: There is significant detachment at the cutting edge, with a detachment area ranging from 15% to 35%.
1B: The cutting edge has severe detachment, with a detachment area between 35% and 65%.
0B: The cutting edge completely falls off, with a detachment area greater than 65%.
Precautions
Cutting depth: Ensure that the cutting depth reaches the substrate and avoid cutting too shallow or too deep.
Adhesive tape selection: Use adhesive tape with specified adhesive strength to ensure consistency of test results.
Operating standards: Strictly follow the standard operation to avoid human error.
Grid test is a simple and effective method widely used in the quality control and evaluation of coatings, coatings, and films. Through this experiment, the adhesion performance of the coating can be quickly understood, providing important references for material selection and process optimization.
Large-scale experimental base
Professional Lab
Analysis Method
Testing/year
WeChat Inquiry
Reservation
Contact Us
National 24-hour service hotline
Address：Juji Industrial Park, Xueziwei, Ngabian, Shajing Street, Baoan District, Shenzhen Building A 1~2F, Building C 3F
WeChat public number
Share industry dry goods
WeChat consultation
Please note consulting services
Follow Jitterbug
Mobile website
di complaint mailbox: customer.complaint@lcs-cert.com complaint telephone tel: 18126445450 certificate report verification of authenticity mailbox: verification@lcs-cert.com