Automatic Scratch Resistance Tester

Automatic Scratch Resistance Tester

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Automatic Scratch Resistance Tester
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Automatic Scratch Resistance Tester

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Automatic Scratch Resistance Tester

The Automatic Scratch Resistance Tester from Qualitest is designed to evaluate the scratch resistance of paints, coatings, varnishes, and related materials under controlled testing conditions. Coatings are used to protect surfaces, enhance appearance, and conceal substrate imperfections, while their hardness is an important indicator of mechanical strength, durability, and overall coating quality. Scratch testing provides an effective method for assessing coating hardness and resistance to surface damage.

ISO 1518, Paints and varnishes — Determination of scratch resistance, specifies a method for determining the resistance of single-coat or multi-coat paint, varnish, and related coating systems to scratching under a defined load. During the test, a specified stylus is drawn across the coated surface. Depending on the coating system, the stylus may penetrate through the coating to the substrate or, in a multi-coat system, reach an intermediate coating layer.

Scratch resistance testing is particularly useful for comparing the performance of different coating systems. It provides relative results for coated panels with significant differences in their resistance to scratching, making it suitable for quality control, product development, and comparative coating evaluation.

Following the revision of the scratch resistance standard in 2011, the test method was divided into two approaches: Constant Loading (CL) and Variable Loading (VL).

  • Constant Loading (CL): A fixed load is maintained on the stylus throughout the scratch test. Results are expressed as the maximum load that does not produce visible damage to the coating.

  • Variable Loading (VL): The stylus load increases continuously from zero during the test. The distance from the starting point to the location where a scratch becomes visible is measured, and the result is reported as the critical load.

Qualitest offers the Automatic Scratch Resistance Tester in CL and VL configurations for Constant Loading and Variable Loading applications. The instrument conforms to the latest ISO 1518 requirements and other applicable testing standards, providing controlled and repeatable evaluation of coating scratch resistance.

Automatic Scratch Resistance Tester

Automatic Scratch Resistance Tester Features

  • Large Movable Working Table
    Features a spacious working table with smooth left-to-right movement, allowing users to conveniently test different areas of the same coated panel.

  • Versatile Sample Fixing Device
    The specially designed fixing mechanism securely accommodates samples with different substrate sizes for stable and consistent testing.

  • Sound and Light Alarm System
    Provides both audible and visual alerts when the stylus punctures through the sample panel, making test results easier to identify.

  • High-Hardness Stylus
    Manufactured from high-hardness material to provide excellent durability and reliable performance during repeated scratch resistance testing.

Automatic Scratch Resistance Tester

Manual fingernail scratches and hand-operated testing methods can introduce operator-dependent variations and inconsistent results. During a scratch test, coating failure can occur through several mechanisms, including elastic deformation, permanent deformation, or cracking of the coating surface.

The Automatic Scratch Resistance Tester provides controlled and repeatable scratch testing by applying precisely defined forces to the coating surface. This reduces operator influence and helps laboratories obtain consistent, reliable data for evaluating coating scratch resistance and mechanical performance.

Constant and Variable Loading Methods

To evaluate coating scratch resistance under different loading conditions, the Automatic Scratch Resistance Tester is available in two configurations: Variable Loading (VL) and Constant Loading (CL). Each model uses a different loading method to assess coating behavior under controlled scratch conditions.

Variable Loading Method — Model QT-ASRT-VL

The QT-ASRT-VL Automatic Scratch Resistance Tester begins the test with zero applied load and continuously increases the force as the stylus moves across the coated panel. A 0.03 mm conical sapphire or diamond stylus is used to create a progressively loaded scratch track.

The increasing load allows users to identify the critical load at which visible coating damage occurs. This method is suitable for determining the load required to produce coating failure, such as cracking, peeling, or other visible surface damage.

Constant Loading Method — Model QT-ASRT-CL

The QT-ASRT-CL Automatic Scratch Resistance Tester applies a constant load throughout the scratch test using a 0.5 mm hemispherical hard-metal tip. Maintaining a consistent load provides controlled conditions for evaluating the coating's resistance to scratching and surface damage.

The constant-loading method is suitable for comparative evaluation of coatings exposed to repeated contact, rubbing, or scraping under a defined force.

International Standards and Compliance

The Automatic Scratch Resistance Tester series supports scratch resistance testing according to recognized international standards, helping laboratories maintain consistent testing procedures across different coating applications.

  • ISO 1518-1 and ISO 1518-2: Specify methods for determining the scratch resistance of paints and varnishes using constant-loading and progressively increasing loading conditions.

  • BS 3900:E2: Provides a method for assessing the scratch resistance of paint coatings.

  • BS EN 13523-12: Specifies a test method for evaluating the scratch resistance of organic coatings applied to metallic substrates.

The Automatic Scratch Resistance Tester can be used for evaluating a wide range of coating systems, including clear coatings, pigmented paints, protective finishes, and industrial coatings applied to metal substrates.

Automated Hardware Features

The Automatic Scratch Resistance Tester incorporates automated testing features designed to improve consistency, simplify operation, and support repeatable coating evaluation.

Integrated Sound and Light Alarm System

The integrated sound and light alarm system provides audible and visual alerts when the testing stylus penetrates through the coating and reaches the underlying sample panel. This provides a clear indication of coating failure and helps operators identify the test endpoint efficiently.

Precision Multi-Area Testing Table

The tester features a large working table with left-to-right movement, allowing multiple areas of the same coated panel to be tested without repeatedly repositioning the sample. This design improves testing efficiency when comparing different locations on a single panel.

A dedicated sample fixing device securely holds substrates of different sizes, helping maintain stable sample positioning throughout the scratch test and supporting consistent test conditions.

Automatic Scratch Resistance Tester Technical Specifications

Ordering information →

Technical Parameter ↓

Automatic Scratch Tester QT-ASRT-CL

(Constant-loading)

Automatic Scratch Tester QT-ASRT-VL

(Variable-loading)

Conform standards

ISO 1518-1
BS 3900:E2, BS EN 13523-12

ISO 1518-2
Stylus Having a hemispherical hard-metal tip of radius 0.5mm Coned sapphire or diamond, the tip radius is 0.03mm
Angle between stylus and sample

90°

90°
Weight 0.5N×1,1N×1,2N×2,5N×1,10N×1 0g~50g or 0g~100g or 0g~200g
Motor 30W  220V  50HZ (110V on request) 60W  220V  50HZ (110v on request)
Stylus Moving Speed (35±5)mm/s (10±2) mm/s
Working Distance 120mm 100mm
Max. Panel Size 200mm×100mm
Max. Panel Thickness Less than 1 mm Less than 12 mm
Dimensions(L×W×H)

560mm×270mm×380mm

580mm×270mm×300mm
Net Weight

17 KG

17.5 KG

Optional Accessories

  • QT-ASRT-ACC 1003---Scratch stylus A, having a hemispherical hard-metal tip of radius (0,50 ± 0,01) mm.
  • QT-ASRT-ACC 1004---Scratch stylus B, having a hemispherical hard-metal tip of radius (0,25 ± 0,01) mm.
  • QT-ASRT-ACC 1007---Stylus for QT-ASRT-VL

Delivery time varies upon stock availability. Our standard dispatch and shipping times are generally within 1 week, however for some high demand items the delivery may be extended to 2-3 weeks. If you require these items urgently please contact us to check accurate stock availability and to organize faster shipping methods.

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Important Delivery Information

Delivery time varies upon stock availability. Our standard dispatch and shipping times are generally within 1 week, however for some high demand items the delivery may be extended to 2-3 weeks.

Need it urgently? Contact us here to check stock and organize faster shipping.

Orders:
Purchaser acknowledges that when placing an order on the Qualitest:

A. the placing of the order signifies the purchaser's assent to place said order at the Qualitest and that the order will be accepted by the successful processing of the order by Qualitest USA LC.
B. the purchaser typing their name when requested to do so by the Qualitest constitutes a signature to contract
C. the purchaser has the full authority to enter into the contract for such entity, and such grant of authority was indicated by purchaser by placement of the order through the Qualitest.
D. A minimum handling fee will be applied to the shipping total for all orders.

Shipping within the U.S.A.:

All orders will be shipped best way prepaid, via courier for smaller packages or via Freight forwarders for larger crates. A handling fee may be applicable to orders. Title to merchandise transfers to the purchaser upon delivery to the carrier. Loss or damage in transit is the responsibility of the purchaser. Qualitest USA will provide assistance with information needed for processing claims.

Shipping outside of the U.S.A.:

All orders will be shipped best way, via courier for smaller packages or via Freight forwarders for larger crates. A low handling fee may be applicable. Title to merchandise transfers to the purchaser upon delivery to the carrier. Loss or damage in transit is the responsibility of the purchaser. Qualitest USA will provide assistance with information needed for processing claims. Export fees, duties, taxes, and customs clearance are the responsibility of the purchaser.

Shipping insurance is not included, please contact our sales representatives if you need shipping insurance.

Partial shipment: Qualitest USA reserves the right to make partial shipments unless otherwise instructed by the purchaser.

Payment terms: All payments to Qualitest USA are to be made in U.S. Dollars (USD)

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their bank information
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Please allow 5 business days for confirmation of credit and creation of an open account.

Return Policy:

Qualitest USA may accept return of purchased merchandise within North America for refund or credit under the following conditions -

  • There may be an additional restocking fee charged to the transaction if items are already shipped to customer.
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  • All freight, duties, customs, and other related shipping charges for the returned merchandise are borne by the purchaser. Shipments made freight collect will be refused.
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  • Purchaser has confirmed return authorization directly with Qualitest.
  • Merchandise is regular catalog item. Special order items can not be returned.
  • All returned merchandise is subject to inspection by Qualitest. Qualitest reserves the right to refuse return of any merchandise that is used, damaged, or not part of the current published price list. In the case Qualitest does not accept the returned merchandise, reasonable attempts will be made to notify the Buyer and the merchandise will be returned to Buyer as they were received by Qualitest. Damaged merchandise that can be restored to original condition and thus accepted for return will be evaluated on an individual basis. The purchaser will be advised of additional expenses for the repair and restoration of the returned item. After approval, these expenses will be charged to the purchaser in addition to the restocking fee.


Change of Terms:

The acceptance of any order by Qualitest USA is subject to purchaser's assent to all of the terms and conditions set forth herein. Purchaser's assent to these terms and conditions shall be presumed from the purchaser's placement of an order through the Qualitest. Any and all other terms and conditions are expressly rejected, and no addition or modification of terms and conditions shall be binding without the prior agreement of Qualitest USA in writing.

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Information:

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No warranty or affirmation of fact, express or implied, other than expressly set forth herein is made or authorized by Qualitest USA. Qualitest USA disclaims any and all liability for product defect claims. Qualitest USA does not express or imply a warranty that any product on the web site(s) is fit for a particular purpose. Qualitest USA honors the product warranty as published and made available by Qualitest USA. Warranty claims for products not manufactured by Qualitest are the responsibility of the manufacturer. Qualitest USA will always make its best good faith effort to resolve warranty claims. 


Force Majeure:

Qualitest USA shall not be liable for any delay in or impairment of performance resulting in whole or in part from Acts of God, service interruptions, labor disruptions, insurrections, governmental decrees or controls, war risks, severe weather, supplies or raw materials, inability to procure or ship products, inability to obtain permits and/or licenses, or any other circumstances or causes beyond the control of Qualitest USA in the conduct of its business. 

Qualitest USA Privacy Policy 

I. What legal provisions govern our data processing practices? How and from where (internal/external sources) is personal data acquired? What are the rights of the user (web site visitor/registered customer)? 

1. General
As a general principle, no personal details need to be provided when visiting our Internet site. Data made available to us by you is treated in strict confidence and in accordance with the provisions of the Federal Data Protection Act. With a few exceptions (see point 2 below), our web server only registers non-personal (anonymous) data concerning the use of our site. Specifically, the log files of our web server, as a general rule, only contain the user's IP address, the last page visited by the user, the browser used, date, time and the file requested. This anonymous data, however, does not permit conclusions to be drawn about the individual users, and merely serves to prepare statistics on the use of our Internet site for the purpose of its improvement. At the same time, great importance is placed on ensuring that usage data is not linked with personal data. 

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3. Technical measures

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IV. Which department answers questions about the processing of personal data? 

5. Contact

In the light of the rapid technical developments in connection with the Internet, we make every effort to constantly improve our Internet site and technical precautions, including those connected with data protection. We will keep you suitably informed about such measures. Any changes will be published here. Further information is available at any time by contacting Qualitest USA.

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