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Unveiling the Knowledge of Water-Based Paints: How Much Do You Know?
Release time:
2018-09-06
1. What thinner is used for water-based paint? Answer: Water is the thinner for water-based paint. When choosing water to thin water-based paint, it only needs to meet the national drinking water standards. For two-component water-based paints, it is recommended to add the curing agent first, mix it evenly, and then add water to dilute and mix. 2. What should be noted when diluting water-based paint? Answer: When diluting water-based paint with water, the first thing to note is the pH value of the water, to prevent the addition of acidic water, which will affect the stability of the paint liquid in the future, causing the pigments in the paint to easily settle or be difficult to stir. PH value adjustment principle: adopt a small amount of multiple dilutions
1. What thinner should be used for water-based paint?
Reference Answer:
Water itself is the thinner for water-based paints. When choosing water to thin water-based paint, it only needs to meet the national drinking water standards. For two-component water-based paints, it is recommended to add the curing agent first, mix it evenly, and then add water to dilute and mix.
2. What should be noted when diluting water-based paint?
Reference Answer:
When diluting water-based paint with water, the first thing to note is the pH value of the water, to prevent the addition of acidic water, which will affect the stability of the paint liquid in the future, causing the pigments and fillers in the paint to easily settle or be difficult to stir. PH value adjustment principle: Adopt the principle of diluting in small amounts multiple times, and the total dilution amount should not exceed 10%.
3. How much water should be added to water-based clear paint? How long is the drying time? What is the coating area?
Reference Answer:
Primers usually add 30% water, and topcoats usually add 5-15% water. It usually reaches touch dryness after 10-15 minutes, and reaches recoatable state after 4-6 hours. Coating area: Primer is about 70㎡/coat, topcoat is 20-25㎡/two coats.
In-depth knowledge of water-based paint
4. How much water should be added to water-based color paint? How long is the drying time? What is the coating area?
Reference Answer:
For water-based color paints, both primers and topcoats usually add about 30-40% water. It reaches touch dryness after 10-15 minutes, and reaches recoatable state after 4-6 hours. Coating area: Both primer and topcoat are about 30㎡/coat, and 20-25㎡/two coats when brushing.
5. What is the most important thing to note when brushing water-based paint?
Reference Answer:
First, if using a new wool brush, it must be immersed in water mixed with detergent for more than 2 hours, then rinsed clean with water before use; second, do not brush back and forth too much in the same position, especially in hot and dry environments where the surface dries quickly (≤5 minutes), otherwise it will cause brush marks and affect the flow of the paint film as the paint film surface dries.
6. What is the most important thing to note when spraying water-based paint?
Reference Answer:
First, the nozzle size of the spray gun is generally Ф1.5; second, the air pressure is 6 to 8 Pa; third, the uniform wet film forming method of spraying one gun at a time is adopted, and the missed areas can be re-sprayed without cross spraying; fourth, when spraying large workpieces, the nozzle is slightly outward, spraying from near to far, and spraying from far to near is strictly prohibited, otherwise paint mist pollution will occur.
7. Why do some water-based paints need to be operated in a non-ventilated environment?
Reference Answer:
Generally, it is due to poor product performance and demanding film-forming methods. Once ventilated, the surface will inevitably dry too quickly, easily resulting in the adverse effect of surface drying but not internal drying, ultimately leading to whitening and cracking.
8. What should be noted when using water-based coatings in high humidity and low temperature conditions?
Reference Answer:
Below 5℃ and humidity above 85%, applying water-based paint will cause surface whitening and slow surface drying. If the project has a tight deadline and construction is urgent, please take measures to increase temperature and reduce humidity, such as adding infrared lamp irradiation and other heating tools to increase the ambient temperature.
9. How long after applying water-based paint should it not be exposed to water?
Reference Answer:
After applying water-based paint, it should not be exposed to water for at least 7 days (at 25℃ and about 50% humidity). If the temperature is lower and the humidity is higher, the drying time of the paint film must be extended.
10. What are the storage environment and packaging and transportation requirements for water-based paint?
Reference Answer:
Water-based paint is a non-flammable and non-explosive non-hazardous product, so storage and transportation do not need to be considered as hazardous goods. Because the system contains water, the packaging material should consider rust prevention treatment. The recommended storage conditions are 0-35℃, in a cool, dry, and ventilated indoor warehouse, with a storage period of one year.
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