1, sag

Reasons:

(1) The construction of the paint stick the end of low, the coating is too thick

(2) uneven finishing

(3) spray air pressure of uneven

(4) was painted surface is too smooth

Interval between the layer (5) lack of time

(6) diluent evaporation rate is too slow

2, white

Reasons:

(1) Construction humidity, high temperature, rapid solvent evaporation (finishing white)

(2) paint or thinner containing water (finishing white)

(3) diluent solvent power is not enough, the coating resin precipitates white (finishing white)

(4) hand sweat stain painted surfaces (film hard work, over time white)

(5) substrates with high moisture content or contain other chemicals were overweight (film hard work, over time white)

3, bleeding

Reasons:

(1) the ground is dry coated layer

(2) colored nitro coated with polyester paint

(3) primer in the organic pigment, resistant insoluble poor, not closed deal.

4, orange peel

Reasons:

(1) The paint is too thick

(2) spray too much pressure on the nozzle surface to be coated is too far away or too close

(3) thinner poor solvency

(4) The ambient temperature is too high

5, the end of bite

Reasons:

(1) the underlying surface is not complete, such as nitro end of the polyester surface

(2) the ground is dry coated surface layer of paint

(3) the underlying coating is too thick.

, Bubble, pinhole (coating in the solvent is not completely volatile, surface dry, resulting in the surface of the volatile material hoisting, bursting as the eye of a needle, if not bursting compared with bubble)

Reasons:

(1) paint application viscosity is too high, the paint bubbles release no

(2) thick coating

(3) construction of the ambient temperature is too high

(4) curing agent is not supporting or increase the amount of excess

(5) thinner supporting

(6) paint dry too fast

7, the rough

Reasons:

(1) paint fineness is not enough

(2) paint, particles, impurities

(3) surface to be coated is not clean.

(4) The construction environment is not clean, dusty

(5) finishing tools are not clean

(6) spray spray exclude the improper generate mist flower

(7) paint expired deterioration rough return

(8), hardener, thinner, not complete

8, cracking

Reasons:

(1) The film hardness, flexibility

(2) at the end of the coating is too thick, did not dry topcoat

(3) drier and excessive surface dry speed is too fast

(4) paint is not complete, the bottom surface hardness that much difference.

(5) surface coating weatherability

(6) bad construction in hazardous gas environments

(7) the surface layer of solid content is low, the film combining power

9, from the skin

Reasons:

(1) surface to be painted without a net, oil, water, wax ...

(2) between the substrate and the coating is too smooth, coating adhesion is not strong

(3) the bottom is dry painted surface, the surface coating surface tension is too large, causing the shedding of undercoat

(4) paint coating between supporting

(5) the putty scratch, solvent or water is not the complete evaporation of the subsequent coat

(6) Wood moisture content is too high or too heavy with other chemicals

10, an oil

Reasons:

Air, oil or water spray (1)

(2) of the painted surface have grease, wax, soap, acid, alkali and other impurities

(3) The painted surface is too smooth

(4) the environment is polluted

keywords: Thinner, finishing, bottom, paint, construction, air pressure,