What you may not know, water-based varnish spraying construction tips!

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Loss of paint film

When the coating film dries, its surface loses its luster and presents a semi-matt/matt state of expression

Cause analysis

• The water-based paint layer is sprayed too thickly, the flashing time is short, and the moisture is not volatile

• When the primer layer contains a lot of pigments and porous properties (the surface of the primer with poor sealing performance)

• The varnish layer is not completely dry and placed in a high humidity environment

• When the surface coating film is too thin or not completely dried, polish the surface of the coating film

•Apply quick-drying curing agent or thinner

Precaution

•Choose high-quality closed primer and high-solid varnish, according to the standard construction work

•Keep the flash dry time between water-based paint layers

• Make sure the colored paint layer is completely dry before spraying the varnish

• Ensure that the varnish layer is dried and placed in a high humidity environment

• Use P1200-1500 model beauty sandpaper to lightly grind the surface of the plate for polishing and remedial treatment 

Adhesion is not strong

Insufficient adhesion between the surface coating and the base coating, resulting in coating peeling

Cause analysis

•Improper grinding and cleaning of the substrate, and the type of primer on the surface of the substrate does not match (bare plastic or bare metal)

• The flash-off time between different coatings is too long

• Insufficient flashing time between coats (water-based paint is not dried)

•Coarse paint layer spraying (more fog spraying quantity)

• Insufficient film thickness, thin topcoat

Precaution

• Thoroughly clean the surface of the board before spraying

•Choose the appropriate primer model and apply according to the operating requirements

•Construction after the coating room is fully flashed (water-based paint)

• Spray according to the requirements of the paint manufacturer

Coated particles

Irregular raised particles on the surface of the topcoat

Cause analysis

• Poor cleaning of the surface to be sprayed, poor cleaning of the spray gun

• The construction environment is not clean, and the builders wear unclean clothes

• The air in the spraying barn is not filtered and not well ventilated

• The compressed air hose is more dusty

• If the coating is not dry, remove the vehicle panels from the baking room

Precaution

•Ensure that the spraying barn is well ventilated

• Clean the vehicle before entering the roasting barn, and apply standard masking materials

• Keep the compressed air equipment pipeline clean

•Keep spray tools clean and free of stains

• Spraying personnel wear spraying overalls and work caps

Remedy

• Lightly micro-particles.

•The coating surface is more serious.