Published 19 July 2026 · JIYU Technical Team
IN SHORT
ENF, E0 and E1 are formaldehyde emission grades defined by China's GB/T 39600-2021 standard, measured in a 1m³ climate chamber: ENF (≤0.025 mg/m³) is the strictest and safest, E0 (≤0.050 mg/m³) is mid-tier, and E1 (≤0.124 mg/m³) is the baseline. For Malaysian homes, furniture factories and renovation projects, ENF-grade plywood delivers the lowest formaldehyde exposure, making it the best choice for bedrooms, nurseries, kitchens and enclosed spaces where air quality directly affects health.
When you're selecting plywood for a wardrobe, kitchen cabinet or renovation project in Malaysia, you'll often see labels like ENF, E0 or E1 attached to emission ratings. These aren't marketing buzzwords—they're official formaldehyde release grades that directly affect indoor air quality and long-term health. Formaldehyde is a colourless gas released by the glue in many engineered wood products; prolonged exposure can irritate eyes, throat and respiratory systems, and high concentrations are classified as carcinogenic. This guide breaks down what ENF, E0 and E1 mean, how they're measured, and why choosing the right grade matters for your Malaysian home or commercial project. Whether you're a furniture manufacturer, interior designer, renovation firm or cabinet maker in Selangor, understanding these standards will help you specify safer materials and build trust with your clients.
ENF, E0 and E1 are three tiers of formaldehyde emission limits established by China's national standard GB/T 39600-2021 for engineered wood products like plywood, particleboard and MDF. The grades rank materials by how much formaldehyde gas they release into the air, measured in milligrams per cubic metre (mg/m³) using a 1m³ climate-chamber test method. ENF is the highest environmental grade, meaning it permits the lowest formaldehyde release; E0 is the middle tier; and E1 is the baseline acceptable level. These classifications help manufacturers, specifiers and end-users compare products on a standardised safety scale. In Malaysia, where imported plywood often carries Chinese certifications, understanding these grades lets you choose boards that meet stricter indoor-air-quality expectations, especially for enclosed residential and commercial spaces where ventilation may be limited.
Formaldehyde is a volatile organic compound (VOC) commonly found in the adhesive resins that bond plywood veneers together. In Malaysia's hot, humid climate, higher temperatures can accelerate off-gassing, releasing more formaldehyde into indoor air. Prolonged exposure—even at low concentrations—can cause eye irritation, headaches, respiratory discomfort and allergic reactions; long-term exposure to elevated levels is linked to more serious health risks. Homes, offices and furniture showrooms often have limited natural ventilation and rely on air conditioning, which recirculates indoor air and can concentrate VOCs. Choosing lower-emission plywood grades directly reduces the formaldehyde load in bedrooms, nurseries, kitchens and living areas, protecting occupants and improving overall indoor air quality. For furniture factories, renovation firms and interior designers, specifying safer grades also demonstrates due diligence and builds client confidence in health-conscious design.
Under GB/T 39600-2021, the three grades set specific upper limits for formaldehyde release measured by the 1m³ climate-chamber method. ENF grade requires ≤0.025 mg/m³, making it the most stringent and safest tier. E0 grade allows ≤0.050 mg/m³—twice the ENF limit but still significantly cleaner than the baseline. E1 grade permits ≤0.124 mg/m³, which is roughly five times the ENF threshold and represents the minimum acceptable standard for indoor use. Lower numbers mean less formaldehyde in the air, so ENF-grade plywood releases the smallest amount of gas over time. When comparing products, always check that figures use the same unit (mg/m³) and test method; mixing units like mg/L or mg/100g can lead to confusion. For health-sensitive projects—children's furniture, hospital fit-outs, long-stay residential interiors—ENF grade offers the widest safety margin.
For most Malaysian residential and commercial projects, ENF-grade plywood is the recommended choice because it provides the lowest formaldehyde exposure and the highest margin of safety. Bedrooms, nurseries, kitchens and enclosed office spaces benefit most, since occupants spend many hours in these environments with limited fresh-air exchange. E0 grade is a reasonable middle ground for budget-conscious projects that still prioritise health, offering emission levels half those of E1. E1 grade meets the legal baseline but leaves less room for vulnerable populations—young children, elderly residents, individuals with asthma or chemical sensitivities—who are more affected by indoor air pollutants. Furniture factories, cabinet makers and renovation firms that specify ENF or E0 materials can differentiate their offerings, justify premium pricing with documented safety data, and reduce warranty or liability concerns related to indoor air quality complaints.
JIYU's ENF-grade plywood, manufactured under the Shengshi Gelin brand in Langfang, China and supplied from Puchong, Selangor, uses soybean-based adhesive instead of traditional urea-formaldehyde or phenol-formaldehyde resins. Because formaldehyde in plywood comes primarily from chemical glues, switching to a plant-derived soy adhesive drastically cuts emission levels at the source. The boards are constructed with nine or eleven cross-laminated veneer layers, typically in 2440 mm × 1220 mm × 18 mm sheets, and are tested to the GB/T 39600-2021 ENF standard. Third-party laboratory analysis by the CMA-accredited Liuzhou Quality Inspection and Testing Research Center (report JC26-WT0087, issued 14 July 2026) confirmed that a tested sample released only 0.022 mg/m³ of formaldehyde after 77 hours in a 1m³ climate chamber—comfortably below the 0.025 mg/m³ ENF threshold and well under E0 and E1 limits.
Independent, accredited laboratory testing offers the most reliable proof that a plywood product meets its claimed emission grade. JIYU's ENF-grade plywood was evaluated by Liuzhou Quality Inspection and Testing Research Center, a CMA-recognised facility, using the 1m³ climate-chamber method specified in GB/T 17657-2022 and GB 18580-2025. The test report (number JC26-WT0087) recorded a formaldehyde release of 0.022 mg/m³, which satisfies the ENF requirement of ≤0.025 mg/m³ under GB/T 39600-2021. This result means the plywood emits formaldehyde at a rate five to six times lower than the E1 baseline, giving specifiers and end-users documented assurance of ultra-low emission performance. Third-party certification eliminates reliance on supplier self-declarations and provides a transparent, traceable safety benchmark that furniture factories, interior designers and renovation contractors can share with their own clients to justify material selection and support green-building or health-focused design claims.
Is ENF-grade plywood safe for children's bedrooms and nurseries?
Yes. ENF-grade plywood releases ≤0.025 mg/m³ of formaldehyde, the lowest emission tier under GB/T 39600-2021, making it suitable for health-sensitive spaces like children's bedrooms, nurseries and schools. The ultra-low formaldehyde level minimises respiratory irritation and long-term exposure risks, which is especially important for young children who spend many hours indoors and whose developing systems are more vulnerable to airborne pollutants.
Can E0 or E1 plywood be upgraded to ENF grade after manufacturing?
No. Formaldehyde emission grade is determined by the type of adhesive resin used during manufacturing. E0 and E1 boards typically use urea-formaldehyde or similar chemical glues that inherently release more formaldehyde; you cannot reduce emissions after production. ENF-grade plywood uses alternative adhesives—such as soybean glue—from the start, which fundamentally lowers formaldehyde at the source. To achieve ENF performance, you must specify ENF-grade materials during procurement.
How long does formaldehyde continue to off-gas from plywood?
Off-gassing duration depends on the adhesive chemistry, board thickness, temperature and ventilation. Plywood made with traditional urea-formaldehyde resins can release formaldehyde for months or even years, with concentrations declining slowly over time. ENF-grade plywood using soybean-based adhesives starts with much lower baseline emissions, so total off-gassing is significantly reduced. While some minimal release may continue, the measured formaldehyde levels remain well below ENF thresholds throughout the product's service life, ensuring safer long-term indoor air quality.
Do Malaysian building regulations specify formaldehyde emission limits for plywood?
Malaysia does not yet have a mandatory national formaldehyde emission standard equivalent to China's GB/T 39600-2021 or Europe's EN 13986. However, green-building frameworks like GBI (Green Building Index) and international health certifications encourage low-VOC and low-formaldehyde materials. Specifying ENF, E0 or E1 grades helps Malaysian projects meet voluntary sustainability targets, satisfy health-conscious clients and align with best practices in indoor air quality, even in the absence of strict local regulation.
Where can I see third-party test reports for JIYU ENF-grade plywood?
JIYU's ENF-grade plywood has been independently tested by the Liuzhou Quality Inspection and Testing Research Center (CMA-accredited). The laboratory report—number JC26-WT0087, issued 14 July 2026—confirms a formaldehyde emission of 0.022 mg/m³, which meets GB/T 39600-2021 ENF requirements. Furniture factories, renovation firms, interior designers and dealers in Malaysia can request a copy of the test report from JIYU for client documentation, green-building submissions or quality assurance records.
About the author
The JIYU technical team comprises wood-product specialists and quality-assurance professionals with expertise in formaldehyde testing standards, plywood manufacturing and environmental compliance. Based in Puchong, Selangor, the team supports Malaysian furniture factories, renovation firms and interior designers in selecting and specifying ENF-grade soybean-glue plywood for health-conscious residential and commercial projects.
Ready to specify the safest plywood grade for your next Malaysian furniture or renovation project? JIYU supplies independently tested ENF-grade soybean-glue plywood with formaldehyde emissions of just 0.022 mg/m³—backed by third-party CMA laboratory certification and a 10-year warranty against delamination, warping and cracking. Contact our Puchong, Selangor team today at jiyu.my to request test reports, sample sheets or a tailored quote for your furniture factory, cabinet workshop, interior design studio or board dealership. Protect your clients' health with plywood that meets the highest environmental standard.
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