The scale Drubber hardness (durometer) The most common applications for rubber and elastomers are Shore scale (usually measured using a device called a durometer). This system includes various scales depending on the properties of the material.

Common Shore scales

• Shore A: The most common scale, used for soft rubber, natural rubber and elastomers such as silicone. Examples include tires and rubber gaskets.
• Shore DFor use hard rubber, hard plastic and materials with lower elasticity. For example: helmets, industrial plastic wheels.
• Shore 0Used for materials extremely soft such as gel, foam, or porous rubber.
• Shore B & CThese are intermediate scales for rubber with moderate hardness, less common than A and D.
• Shore OSuitable for textiles and soft elastomers. 

Use a Teclock rubber hardness tester (durometer). Asker to determine the hardness of the material

Other scales (Less common for rubber)

• IRHD (International Rubber Hardness Degree)Another international standard specifically for measuring rubber hardness, often yielding results comparable to Shore A, but with a different measurement method involving varying pressure requirements.
• RockwellIt is sometimes used for extremely hard plastics or ebonite rubber, but is not as common as Shore in the rubber industry. 

What is the hardness of rubber?

Hardness is a measure of a material's resistance to scratches, abrasion, and indentation.
The hardness of a rubber describes how hard or soft the material is. It is an important factor in product design and is often one of the first properties considered when selecting a material. Hardness will determine the choice of material based on its intended application.

Rules for reading indices (0 – 100)All Shore scales run from 0 to 100: 

• Low numbers (0-30)The material is very soft.
• Average number (40-70): The common hardness of most household rubber products.
• High numbers (80-100): A hard material with minimal deformation.

EVA foam shoe sole hardness tester ASKER C1L

What is a Shore/Durometer hardness tester?

A Shore/Duromter hardness tester is an instrument used to measure the hardness of materials, generally rubbers, elastomers and polymers.

The steel bar is spring loaded and activates a dial gauge with a scale of 1 to 100. The test specimen is placed directly under the beveled cone. The instrument is then pressed against the material until the flat metal plate at the bottom is flush with the elastic specimen.

On its scale, a higher number indicates better resistance to indentation and therefore a harder material. So the less the cone deforms the sample, the higher the hardness of the material.

TECLOCK GS-701G EVA foam hardness tester (type C)

Below are detailed instructions on how to use a durometer to measure rubber hardness:

1. Prepare the sample for measurement. 

• Thickness: The rubber sample must have a minimum thickness. 6mmIf the pattern is thinner, you can layer it, but no more than three layers, and you must ensure that the contact surfaces are flat and smooth.
• Surface: It must be flat, clean, and free of air bubbles.
• Environment: According to the 2025 standard, samples should be kept at room temperature (approximately). $23\pm 2^{\circ }C$23±2°C) for at least 1 hour before measurement. 

2. Steps to perform the measurement 

1. Check the device: Ensure the gauge needle is at the "0" position when no force is applied.
2. Place your order: Place the rubber sample on a flat, hard surface (such as a stone or steel table).
3. Measurement procedure:
   • Hold the durometer vertically (90 degrees perpendicular to the sample surface).
   • Press firmly and quickly (but not jerkily) so that the base of the device is completely pressed against the rubber surface.
4. Read the results:
   • With a single needle: Read the value immediately after the base is pressed against the sample (for conventional vulcanized rubber) or after 1 second.
   • For dual-needle cartridges (like the GS-709G): The needle will stop at the highest value. You can pick up your phone and read the result afterward.

TECLOCK GS-720N, GS-720G Shore D rubber hardness tester

The selection Semiki Measurement Equipment Co., Ltd. For advice and to purchase rubber hardness testing products (such as Teclock, Asker), this is a very good and reliable option.

Specialized expertise in hardness testing equipment.

• Diverse product range: Semiki distributes many well-known brands of rubber hardness testers such as Teclock, Asker (Kobunshi Keiki)
• Consulting capabilities: Semiki's team of engineers is well-trained to guide customers on how to operate, test, and apply hardness testing equipment (Durometer) effectively and in accordance with the latest international standards. 
• Nationwide warranty: Semiki applies a unified warranty policy across all branches nationwide, enabling quick resolution of technical issues from the manufacturer.
• Calibration and Maintenance: The company provides maintenance services and may include a calibration certificate, ensuring the equipment operates accurately over time.
• Technical support: The company continuously updates its digital measurement solutions (such as Measurement DX from Teclock) to help customers modernize their quality control processes. 

Contact Semiki:

Website: You can find out more details and send a consultation request via Semiki.com.

Business email: [email protected]

Phone number (Hotline): +84 979 761 016.