Collection of paint knowledge: 90% of people overlook these "cold knowledge"!

Paint is an indispensable material in home decoration and workwear, but do you really understand many details about it? Meiji Paint has compiled 6 super practical coating tips today to help you avoid pitfalls, save money, and improve construction effectiveness. It is recommended to save them!

1、 How to quickly determine the quality of paint? Just look at these 3 points

Observation of fluidity: Good paint should be stirred evenly without sedimentation, and poured in a streamlined shape without interruption (inferior paint may clump or layer).

Smell: environmental protection paint (such as water-based paint) has only a slight lotion smell, without pungent odor; If you smell a strong "paint smell" (solvent smell), it may indicate a high VOC content.

Touch test: Dip your fingers into a small amount of paint and apply it evenly on the glass. After it dries, it feels smooth, delicate, and tough to the touch, and is not easy to crack or lose powder (inferior paint is prone to roughness and brittleness).

2、 Not used up after opening the paint? This way, it can be stored for six months

Many people casually throw the paint in the corner after opening it, and the next time they use it, it will completely solidify! The correct approach:

Before sealing: Use a scraper to remove any residual paint from the barrel mouth (to avoid poor sealing after drying up), tighten the lid and invert for 10 seconds (to allow the paint to flow back and seal the gap).

Storage environment: Keep in a cool and dry place, away from heating and air conditioning vents (high temperatures can cause coating delamination); Pay attention to antifreeze in winter (water-based coatings are prone to freezing damage below 0 ℃).

Reuse: If slight layering is found, stir evenly without affecting use; If it clumps and smells, just discard it and don't settle for it.

3、 Don't panic when the wall is moldy! Paint cannot be directly applied, do this step first

After the wall becomes moldy, brushing paint directly will only make the mold "come back"! Correct handling process:

Mold removal: Use diluted white vinegar (or professional mold removal agent) to wipe the moldy area, kill the mold spores, and air dry for 24 hours.

Strengthening the base layer: For walls with severe mold growth, sandpaper should be used to remove the loose layer, and a coat of alkali resistant sealing primer should be applied to prevent alkaline substances from seeping out of the wall and causing mold growth again.

Choosing the right coating: When applying subsequent coatings, priority should be given to Meiji paint coatings with added anti mold factors (the packaging will indicate the "anti mold level", and for household use, choose level 0 or 1).

4、 Choosing a roller for painting: short hair vs long hair, the difference is big!

The length of the roller fluff directly affects the coating effect, and choosing the wrong one is equivalent to white brushing:

Short haired roller (1-3mm): suitable for smooth walls (such as latex paint topcoat), with thin and uniform coating, not easy to leave brush marks, suitable for modern minimalist style.

Medium to long hair roller (4-6mm): Suitable for slightly textured walls (such as diatomaceous earth as a base), it can penetrate into texture gaps and avoid missed brushing.

Long haired drum (over 7mm): only used for rough substrates (such as cement walls, insulation layers), rarely used in daily home decoration (prone to shedding hair, too thick coating).

5、 Choosing paint for children's rooms? Don't just focus on "environmental protection", these two points are more important

In addition to low VOC, children's room coatings should also pay attention to:

Scratch resistance: It is common for children to draw and leave fingerprints. Choose a coating that can withstand at least 10000 washings (using a damp cloth to rub vigorously 20 times without fading or exposing the substrate).

Impact resistance: The wall is inevitably bumped by toys, so choose a flexible coating (which has elasticity after film formation and is not easily cracked by slight collisions).

Reminder: Avoid the misconception of "colored paint containing lead". Legitimate brand colorants are environmentally friendly and can be used for color matching with confidence. However, it is recommended to choose light colors (reduce the amount of colorants used).

6、 How long can I stay after the paint application? It's not just about being tasteless

Many people think that 'just because the paint has no smell, you can live in it', but that's not true!

Water based paint: When the ventilation conditions are good, the VOC volatilization decreases by more than 80% in about 7 days. It is recommended to ventilate for 15 days before moving in (especially for elderly and children's rooms).

Solvent based coatings (paints): high VOC content, ventilated for at least 1-2 months, can be tested by professional institutions before moving in (indoor VOC concentration ≤ 0.6mg/m ³ is a safe value).

Quick flavor dispersing tip: Add a few pots of water (or activated carbon) and use a fan to blow out air, which is 30% more effective than simply opening a window.

conclusion

Although the paint is small, the details affect the living experience. Mastering these small knowledge can not only avoid construction pitfalls, but also make the wall more durable and environmentally friendly.