Common defects and improvement methods of brush paint film

Sagging

1. The selected paint brush has excessive bristles and is not suitable for

2. Too much paint picked up by the paintbrush

1 Select a paintbrush with appropriate specifications according to the object to be painted

2. The paint brush should pick up the amount of paint according to the predetermined painting area

brush marks

1. The bristles of the paint brush are not neat

2. The bristles of the paint brush are too hard, and the finishing effect is poor after the paint is smoothed

3. The viscosity of the coating is too high and the leveling property is poor

4. Thinner evaporates too fast

1. Trim the brush bristles neatly

2. Select the appropriate paint brush according to the characteristics of the paint

3. Appropriately add diluent

4. Increase the high boiling point components in the diluent

bubble

1. The paint brush is soaked in water and stored, and the water is not removed during use

2. Oil, water or dust adhere to the surface of the object to be coated

3 Do not apply vertically and horizontally alternately when brushing, smoothing, and trimming

1. Be sure to remove the water before using the paintbrush

2 Carefully clean the surface of the object to be coated before brushing

3. The three steps of painting, smoothing and trimming should be carried out vertically alternately

pinhole

1. Moisture is attached to the bristles of the paint brush

2. Paintbrush bristles contain more low boiling point solvents

3. After the paint is smoothed when brushing, the finishing force is too large

1 Before brushing, the moisture attached to the brush bristles should be removed

2. When the bristles of the paint brush contain solvents with low boiling points, make them

Can be used after volatilization

3. Use light force when trimming

paint film

thickness

uneven

1. The solvent evaporates too fast, and the time for smoothing and dressing is too long

2. The amount of paint picked up by the paint brush is inconsistent each time, and the difference is obvious

3. The viscosity of the paint is too high, or the bristles soft

1 Appropriately increase the high boiling point components of the diluent, shorten the time for smoothing and dressing as much as possible, and do not stop

2. The amount of paint picked up by the paintbrush and the painted area should be basically the same

3. Appropriately add thinner, or choose a suitable paint brush