How to identify excessive formaldehyde in flooring? In the flooring industry, there are only two national standards: E1 and E2. For instance, the E1 standard is defined as ≤9mg/100g using the desorption method, ≤1.5mg/liter with the drying chamber method, and ≤0.12mg/cubic meter via the climate chamber method.
The drying chamber method is the officially recognized test procedure in China. This involves placing 10 randomly selected floor samples—each 5 cm wide and 15 cm long—into a special 40-liter container filled with a specific amount of water at the bottom. The test measures the amount of formaldehyde released over time by analyzing how much dissolves in the water. This method is widely used to assess the formaldehyde emission levels of flooring materials.
Some companies often mention an E0 standard, which is 0.5 mg/L. However, it's important to note that this isn't an official national standard in the flooring industry. Instead, the E0 label is more of a marketing term. It was originally registered as a trademark by a company from Henan province after recognizing a business opportunity. Now, some flooring manufacturers use it as a selling point.
According to Dr. Floor, the 0.5 mg/L standard is actually based on Japanese regulations, not the European international standard that some sellers claim. Therefore, when you see the E0 label, it’s essential to verify its origin and understand that it may not meet the same rigorous testing criteria as the E1 or E2 standards.
When purchasing flooring, always look for products that comply with recognized safety standards like E1. This ensures that the material meets acceptable limits for formaldehyde emissions, reducing potential health risks, especially in enclosed spaces such as homes or offices.
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