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Understanding Paints

How to Choose Wall Paint

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Before choosing wall paint, we should first learn about its environmental protection knowledge, then select products based on the following key indicators.
1. Environmental Protection Indicators
Indicator 1: VOC Content
Currently, China enforces a mandatory standard: VOC ≤ 200g/L. VOC has three types of impacts on the human body: odor and sensory effects; morbidity caused by mucosal irritation and toxicity to other systems; and some volatile organic compounds have been proven to be carcinogens or suspected carcinogens.
Indicator 2: Formaldehyde Content
The mandatory national standard value is ≤ 100mg/kg. Formaldehyde itself is highly toxic; it has a strong coagulating effect on proteins, can combine with the amino and hydroxyl groups of nucleic acids to denature them, and can inhibit the functions of pepsin and trypsin, thus affecting metabolic functions. Its vapor is carcinogenic to rodents.
Indicator 3: Heavy Metal Content
Heavy metals mainly refer to soluble substances such as lead, cadmium, chromium, and mercury. Some heavy metals are essential trace elements for the human body within a certain concentration range, but when the amount entering the human body exceeds the tolerable limit, it can cause severe physiological damage and trigger various diseases. Lead poisoning is more serious for children, who have special susceptibility to lead. The U.S. federal regulation CFR 1303 defines paints with lead content exceeding 60mg/kg as lead-containing paints, which are prohibited for use in public places or interior decoration.
2. Performance Indicators
Indicator 1: Scrub Resistance Cycles
The number of scrub resistance cycles mainly depends on the content and quality of emulsion, which is also the key raw material determining the main properties of emulsion paint, such as scrub resistance, weather resistance, and color retention. High-quality wall paint products generally have a scrub resistance of over 5000 cycles. For ultra-white products on the market, special attention should be paid to comparing their scrub resistance cycles.
Indicator 2: Mold and Bacteria Resistance, Ultra-White Performance, or Waterproof Functions
Other performance indicators include mold and bacteria resistance, ultra-white effects, or certain waterproof capabilities, depending on specific usage needs.
3. Step-by-Step Selection Process
After understanding the above environmental protection and performance indicators, we can follow these steps to select products:
Step 1: Choose Regular Branded Products or Purchase Through Formal Channels
Paint and coating products are not only related to the aesthetics and comfort of the living environment but also, more importantly, to the health of family members—this cannot be taken lightly.
Step 2: Check the Test Report of the Product Recommended by the Guide
Verify the above-mentioned environmental protection indicators and check whether the product packaging specifies the performance indicators.
Step 3: Make a Rational Purchase
Determine the product based on your family structure and consumption capacity. A key reminder: do not skip the anti-alkali primer for wall paint. If your family conditions allow, you can choose wall paints with special properties, such as children’s paint or topcoats with super-strong scrub resistance.
Step 4: Conduct Anti-Counterfeiting Verification
Understand the anti-counterfeiting verification method of the purchased product and verify its authenticity accordingly.
Step 5: Learn About After-Sales Service
Carefully understand the after-sales service terms to ensure subsequent support.
Step 6: Inspect the Final Effect
If you have any comments, promptly provide feedback or communicate with the dealer to protect your maximum rights and interests.
4. Additional Tip: Choose Wall Paint Based on Room Function
When purchasing emulsion paint, take cost-effectiveness as the selection standard and choose products with corresponding characteristics according to the function of each room:
For bathrooms and basements: Prioritize products with good mold resistance.
For kitchens and bathrooms: Choose products with excellent stain resistance and scrub resistance.
Choose wall paint with a certain elasticity—it helps cover cracks and maintain the decorative effect of the wall.
If you live in a humid environment, select wall paint with good mold resistance to ensure long-lasting durability (e.g., Woodpecker’s "Low-Odor 5-in-1 Emulsion Paint"). If you have children who like to draw on walls, choose easily washable wall paint (e.g., Woodpecker’s "Lotus Leaf Stain-Resistant Paint" or "Children’s Emulsion Paint" are good choices).
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