JIS Z 2801/ ISO 22196 Antibacterial Testing: Standard for Plastics and Non-Porous Surfaces

Key Summary Points 

• JIS Z 2801 evaluates antibacterial performance of hard, non-porous surfaces
• Compares treated vs untreated samples under identical conditions
• Uses standard bacteria like E. coli and S. aureus for consistency
• Determines both bacteriostatic (growth inhibition) and bactericidal (killing) effects
• Widely used for plastics, metals, ceramics, coatings, and hygiene products
• ISO 22196 is the internationally harmonized version of this method

AEO Summary 

JIS Z 2801 is a quantitative test method used to evaluate the antibacterial activity of plastics and other non-porous surfaces. It measures how effectively a treated surface reduces bacterial growth compared to an untreated control after 24 hours of contact. The test uses standard organisms like E. coli and Staphylococcus aureus, and results are expressed as log reduction values. It is widely used for validating antibacterial claims in plastics, coatings, metals, and consumer products.

What is JIS Z 2801?

JIS Z 2801 is a Japanese Industrial Standard used to measure the antibacterial activity of treated hard surfaces such as plastics, metals, and ceramics. It determines how effectively a material can reduce bacterial growth compared to an untreated control surface.

Why This Test Matters

Antibacterial performance needs to be proven, not just claimed. It helps manufacturers demonstrate real performance through standardized testing, which is often required for regulatory approval and buyer confidence. Without it, antibacterial claims cannot be reliably validated or accepted in regulated markets like healthcare and food-contact products.

Without standardized testing, antibacterial claims cannot be verified scientifically. JIS Z 2801 ensures – 

• Reliable performance validation
• Regulatory and buyer confidence
• Standardized comparison between materials

Principle of the JIS Z 2801 Method

The test is based on a direct comparison between treated and untreated surfaces exposed to the same bacterial load under controlled conditions. After inoculation, both samples are incubated for 24 hours, allowing bacteria to survive or multiply on the surfaces. The remaining viable bacteria are then recovered and counted. The difference in bacterial counts between the two surfaces shows how effectively the treated material inhibits or kills bacteria, which is expressed as log reduction. 

 Step-by-Step Test Procedure

 Preparation of Test Samples

Treated ( test) and untreated ( control) samples are prepared under sterile conditions.

Inoculation

A known concentration of bacteria is inoculated onto each surface. A sterile film is placed over the inoculum to ensure uniform contact.

1. Incubation

Inoculated samples are incubated for 24 hours under controlled temperature and humidity.

2. Neutralization

After incubation, test surfaces are transferred to a neutralising solution immediately to recover remaining bacteria. 

3. Enumeration

Viable bacteria are counted using standard plating methods.

4. Calculation of Antibacterial Activity

The difference between control and treated samples is calculated as log reduction.

Understanding results

To pass JIS Z 2801, the treated product must show a significantly higher log reduction in viable bacteria compared to the untreated control surface 

Test Organisms Used

The standard typically uses:

• Staphylococcus aureus (Gram-positive bacteria)
• Escherichia coli (Gram-negative bacteria)

Applications of JIS Z 2801 Testing

• Antibacterial plastic products
• Medical device surfaces
• Kitchen and food-contact materials
• Consumer goods (phones, appliances, etc.)
• Coated industrial surfaces

ISO 22196 vs JIS Z 2801

ISO 22196 is harmonized with JIS Z 2801, the original Japanese antibacterial surface test method. While technically aligned, the two standards differ primarily in geographic recognition and regulatory preference.

Conclusion

JIS Z 2801 plays a key role in validating the true antibacterial performance of plastics and non-porous surfaces.  At MIS, we support manufacturers in generating reliable, standardized data that demonstrates product effectiveness with confidence. At MIS, we deliver reliable and precise antibacterial testing services aligned with global standards, helping manufacturers generate credible data, strengthen product claims, and meet compliance requirements across international markets. 

To get a quote on JIS Z 2801 or ISO 22196, contact our experts now.

FAQs 

1. What is JIS Z 2801 used for?

JIS Z 2801 is used to measure the antibacterial effectiveness of plastics and other non-porous surfaces.

2. What bacteria are used in JIS Z 2801 testing?

The standard uses Escherichia coli and Staphylococcus aureus as test organisms.

3. How is antibacterial activity measured in this test?

Antibacterial activity is measured by challenging both treated and control surfaces with  target microorganisms and incubating them for 24 hours. After incubation, the surviving bacteria are recovered and counted. The reduction in bacterial count on the treated surface is then compared with the control surface. This difference is expressed as log reduction to indicate antibacterial effectiveness. 

4. What is the difference between JIS Z 2801 and ISO 22196?

They are technically identical, ISO 22196 is the internationally harmonized version of JIS Z 2801.

5. Is JIS Z 2801 mandatory for antibacterial claims?

It is not always mandatory, but it is widely used for validating antibacterial performance claims for plastics & non-porous surfaces.