Common Construction and Drying Methods for Antiviral Water-based Paint

Antiviral water-based paint has gradually replaced traditional paint and become a popular eco-friendly choice. Common application methods include brushing, spraying and wiping, while natural drying and hot-air drying are the most frequently used drying methods.

1. Brushing

Water-based paint can be applied with water-resistant nylon brushes that are non-shedding, soft and highly absorbent. The brush can be rinsed with clean water before use and applied directly while damp. After two coats, a bright protective layer is recommended, applied in one direction to reduce brush marks.

2. Spraying

Spray guns are more suitable for large-area or furniture construction, and can be used with ordinary air compressors, air sprayers or airless sprayers. Note that parts of the spraying equipment in contact with the paint should be protected with stainless steel or Teflon lining instead of aluminum parts. Additives in water-based coatings may react with alloys such as aluminum, causing corrosion, powdering, discoloration and poor finishing.

3. Wiping

For cotton-cloth wiping, water-based paint is recommended to be diluted first; otherwise it dries too quickly, causing the cotton cloth to clump and resulting in uneven coating. This method is not suitable for water-based coatings in practical construction. Improper operation may lead to uneven wiping, inconsistent film thickness and color variation. Therefore, this method is not recommended.

Drying methods for water-based paint:

Natural drying is simple, widely applicable and currently the most common method. Since there is no solvent in the air, the drying process of water-based paint — the evaporation of water — is less affected by external solvents; however, due to ambient water vapor and temperature effects on water evaporation, the drying speed of the paint film is highly influenced by the environment.

Hot-air drying accelerates moisture evaporation in the paint film through convection of dry hot air over the surface, achieving faster drying. This provides a relatively stable drying environment, increases speed and improves efficiency. Issues such as surface defects may occur with thick films or insufficient drying time, so balance is required in film thickness, waiting time and gradient temperature control.

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