Bleeding

Phenomenon: the primer pigment penetration into the finish, finish the splash or discoloration caused by.
Cause: the hardening agent added in excess of atomic ash; color is deep and unseasoned and light complexion and with strong solvency of solvent; primer used transfer resistance difference of pigment.
Prevention: scraping putty, should be in the correct proportion and hardening agent with the best use of the production of primer; resistance to penetration of the inorganic pigments; dark bottom Zhang or fill the eye ash properly closed / isolated and spray paint.
Correct: the complete removal of the old paint film have included color bleeding part, re coating.
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Floating color

Phenomenon: and because the majority of paint are the different pigments combination, and each kind of pigment particle size, shape, proportion, dispersion, cohesion and so different, make the film surface and the lower pigment uneven distribution, fault section presents the hue difference phenomenon.
Cause: the density difference between the selected color paint pigments in the preparation of larger; complex color paint, dispersion is not up to the requirements; does not add anti floating color agent; construction of the viscosity is too low, dry too slow.
Prevention: improving coating formulation, the dispersing agent necessary, anti floating color agent; improve construction viscosity, drying rate.
Correct: if the paint is wet, then spray a qualified topcoat in full of volatile, can remove floating color phenomenon; if the film is completely dry, can be polished re coating.
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Fade / discoloration

Phenomenon: the film in the process of using the color change, the phenomenon of departure from the original colour standards.
Cause: vehicle long time exposed to corrosive atmospheric environment (such as sulfur dioxide), did not pay attention to maintenance; poor weatherability paint for automobile; curing agent selection is not reasonable, easy to yellow; ratio is not correct, curing agent dosage, too little.
Prevention: regular maintenance to enhance vehicle, avoid the corrosive gases Long Park; selection of automobile coatings excellent weatherability and non yellowing curing agent; in the correct proportion of adding curing agent, avoid by all means less and curing agent.
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The loss of light

Phenomenon: the film in dry or in use process appear shiny decreased, reflecting the surrounding objects definition of variation phenomenon.
Cause: the underlying film is not completely dry immediately spray paint, causing topcoat solvent infiltration, film shrinkage; bottom film sealing difference, ratio of pigment and binder is not correct, low polymerization degree, fill the oil quantity is too big, the grinding is not enough; two-component coating not proportionally mixed with, or product does not matching; spraying humidity excessive, or coating pigment or solvent with high moisture content; the substrate is too rough, not fully polished or cleaning film poor maintenance.
Prevention: the design is reasonable primer or intermediate paint formula, make the primer or primer surfacer isolation performance is good; in strict accordance with the correct proportion of paint, processing of paint bottom material; regular care, to improve the resist performance.
Correct: if a slight loss of light, can restore luster by waxing and polishing,; if the loss of light is serious, shall be polished finish, re coating.
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Spalling / poor adhesion

Phenomenon: because of the paint coating adhesion is poor, the produced by coating peeling or shedding phenomenon under external force.
Cause: a substrate treatment is insufficient, did not completely remove rust, oil, water or grinding is not sufficient; selection of paint is not complete or the upper and the lower coating binding force is poor; the bottom paint is too thick, the static and the drying time is too short, primer did not dry completely.
Prevention: the surface must be thoroughly treatment. Material force strong binding coating material or the upper and lower matching selection and bottom. In accordance with the construction method of technical data suggest. Keep dry time specific.
Correct: the defective part completely polished, and then re spraying polyester.
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Atomic ash printing

Phenomenon: in the local repair, paint layer visible lower atomic ash or bottom coating around the edges and sanding marks.
Cause: atomic ash incomplete hardening produced shrinkage depression by atomic ash or ash filled eye repair parts, without backing or closed, directly spray paint; finish not suitable diluents, penetrating power is too strong; sandpaper choose too coarse, on putty polished, still visible sandpaper trace.
Prevention: Ash should not be a one-time scraping smear too thick atom, and completely dry hardening after the primer coated isolation; atomic ash is generally used for epoxy primer or bare iron, should not be used for bottom material inappropriate, leading to tension difference; selection of station suitable sanding, general selection of coarse sandpaper, then fine sandpaper grinding.
Correct: re grinding, the patch area and flat, and then again coating
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Water mark

Phenomenon: the film surface produced by residual water droplets evaporate after the milk white marks or spots, and can not be erased by rag phenomenon.
Cause: the coating for water resistance, moisture resistance is poor; the paint film is not cured exposed contact with drops of water in the rain or adding curing agent; the amount of improper, or the thicker film.
Prevention: choose the excellent water resistance anti moisture products topcoat; film until fully cured. Avoid contact with rain; in accordance with the construction of description data with paint; wash immediately after dry, dry.
Correct: polished surface, eliminate imprinted; if the circumstances are serious, it should be polished to spray.
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Sandpaper mark / scratch

Phenomenon: finish in the coating or drying can clearly see the grinding sandpaper marks, scratches and other defects phenomenon.
Cause: use sandpaper models are not appropriate, too thick or poor quality. Atomic ash or primer / paint is not dry completely into the hit set. Primer / paint hardness difference, poor sealing ability, paint containing solvent power too strong.
Prevention: the appropriate choice of good quality sandpaper; before grinding, should be fully dry; selection of good quality or paint primer.
Correction: the paint is dry, the use of suitable sanding finish, re coating.
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To bite the end

Phenomenon: the coating layer erosion will Liao, paint softening, bulging wrinkle phenomenon.
Cause: the upper and lower coating is not complete; the dissolving capacity of coating paint on too strong; coatings film is not completely dry spray paint, interval time is too short bottom surface coating.
Prevention: the selection of construction supporting system on coating; coating selection the same diluent; keep the volatile enough time between the two layers.
Correct: remove the bite and then re spraying coating.
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Poor drying

Phenomenon: the paint spraying is finished, in quite long time, the film has not yet dry, weak, low hardness, poor adhesion phenomenon, a finger pressing surface is very easy to appear after the handprint.
Cause: a two-component coating ratio is not correct, curing agent dosage is too small or too much; spray paint is too thick; selected solvents volatile too slow; substrate treatment is not sufficient, stained with grease or wax; ambient temperature is too low, the drying time is too short.
Prevention: before painting will be painted surface clean; according to the correct mixing paint, avoid by all means in order to save material and less adding curing agent or leakage and curing agent; avoid spraying too thick; if the ambient temperature is too low, you can use quick drying accelerator, or improve the construction environment; supporting the use of dilution agent.
Correct: forced drying at the correct temperature; if it is not dry, remove the soft coating with thinner cleaning or polishing method, and then re spray.
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