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Read the SGS antibacterial and antifungal report for our Flexible Stone. Tested under HG/T 3950-2007, our material eliminates 99.9% of E. coli and S. aureus, ensuring a hygienic and mold-free environment for public spaces.
1. Report Overview
This article presents the official SGS test report (Report No. GZIN2509003897PL15_EN) evaluating the antibacterial and antifungal properties of our Flexible Stone. Conducted by SGS-CSTC Standards Technical Services Co., Ltd., the test assesses the material’s ability to inhibit the growth of harmful bacteria and mold. The results confirm that our material provides exceptional hygienic protection, making it a premium choice for Flexible Stone Engineering in healthcare, educational, and high-humidity Facade Retrofit or interior projects.
2. Data Analysis: The Science of a Healthier Surface
According to the test results, the Flexible Stone demonstrated remarkable antimicrobial efficacy after 24 hours of contact:
- Escherichia coli (E. coli): Antibacterial rate > 99.9%
- Staphylococcus aureus: Antibacterial rate > 99.9%
- Stability Test: After 100 hours of intense UV irradiation, the antibacterial rate remained > 99.9%.
- Antifungal Test: Exposed to 6 types of mixed mold spores for 28 days, the material achieved a Moldy Grade 2 (meeting industry standards for effective mold resistance).
Engineering Value for Public Spaces:
- Break the Chain of Infection: Surfaces in hospitals, schools, and shopping malls are hotspots for bacteria transmission. With a >99.9% kill rate, our Flexible Stone actively purifies the wall surface, creating a safer environment for occupants.
- Long-Lasting Protection: The UV stability test proves that the antibacterial agents are not just a temporary surface coating. They are embedded within the material, ensuring protection that lasts for years.
- Mold Resistance in Humid Climates: For basement renovations or exterior walls in rainy climates, the antifungal properties prevent the unsightly and unhealthy black mold growth, maintaining both aesthetic and structural integrity.
3. Test Methodology
The SGS evaluation was conducted strictly under the Chinese chemical industry standard HG/T 3950-2007 (Antibacterial coating).
- Test Standard: HG/T 3950-2007 (Appendix A & B)
- Antibacterial Test: Bacteria suspension (5.9×10⁵ CFU/mL) was applied to the sample and incubated for 24 hours.
- Stability Test: Specimens were irradiated under a 30W UV lamp for 100 hours before testing to simulate long-term exposure.
- Antifungal Test: The sample was exposed to a mixed spore suspension (1.0×10⁶ spores/mL) of 6 common molds for 28 days.
Note: The test report explicitly states that it is intended for internal quality control and R&D. For official bidding or compliance verification, the specific SGS report number (GZIN2509003897PL15_EN) should be referenced.
4. FAQ
Q1: How does the >99.9% antibacterial rate benefit a hospital or school project?
A: It means the wall surface actively kills 99.9% of common harmful bacteria like E. coli and S. aureus within 24 hours. This significantly reduces the risk of cross-infection via surface contact, making it an ideal material for sensitive public spaces.
Q2: What does a “Moldy Grade 2” mean in the antifungal test?
A: Under the HG/T 3950 standard, Grade 0 is no growth, Grade 1 is <10% growth, and Grade 2 is >10% growth. Achieving Grade 2 after 28 days of exposure to 6 aggressive mold strains proves the material has strong antifungal properties, preventing black mold from developing in humid or damp environments.
Q3: Does the antibacterial effect fade over time or under sunlight?
A: No. The report shows that even after 100 hours of intense UV irradiation, the antibacterial rate remained >99.9%. This proves the antimicrobial properties are highly stable and resistant to weathering.
Q4: Is this material safe for indoor air quality?
A: Absolutely. Combined with our non-radioactive (Class A) and non-hazardous (SDS) certifications, the Flexible Stone does not release toxic chemicals. The antibacterial properties work safely to improve indoor air quality and surface hygiene.