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1. The profile surface shall be tidy and has no defects such as cracking, peeling, corrosion and bubbles.
2. Slight pressure hole, bruise or scratches in the profile surface, the allowable depth in the decoration surface shall be no more than 0.07mm, and that in non-decoration surface shall be no more than 0.10mm. The depth of the impress shall be not more than 0.03mm.
3. Partial strains arising from cutting are allowed in the end heads of the profiles, but the vertical length shall not exceed 10mm.

Color and aberration
The color of the coating shall be basicallythe same as agreed by both the supplier and the buyer. When tested withcolorimeter, the aberration between the single color coating and sample △Eab·≤1.5, and the aberration for the same (delivery)lot of profiles △Eab·≤1.5

Coating thickness
Min partial thicknessof the decoration surface≥40μm

Indentation harness
Indentationresistance of coating ≥80

Adhesive quality
The dry, wet and boiling adhesive quality of the coating shall reach level 0.

Impact resistance
The coating shall have no cracking or shreds after impact tests.
When the supplier and the buyer are negotiating to use coatings with special features but bad impact resistance, the coating is allowed to have slight cracks after impact tests, however, the surface of the coating shall have no shreds or adhesion when it is further tested with adhesive tapes.

Cup drawing resistance
The coating shall have no cracking or shreds after cup drawing tests.
When the supplier and the buyer are negotiating to use coatings with special features but bad cup drawing resistance, the coating is allowed to have slight cracks after impact tests, however, the surface of the coating shall have no shreds or adhesion when it is further tested with adhesive tapes.

Bending resistance
The coating shall have no cracking or shreds after bending tests.
When the supplier and the buyer are negotiating to use coatings with special features but bad bending resistance, the coating is allowed to have slight cracks after impact tests, however, the surface of the coating shall have no shreds or adhesion when it is further tested with adhesive tapes.

Appearance quality
The coating on the decoration surface of the powder spraying profiles shall be smooth, even and have no defects that may affect use such wrinkles, cracks, bubbles, stream traces, pastiness and shreds of paint films. It is allowed to have slight peeling, the extent of which shall be subject to the surface of sample agreed by the supplier and the buyer.

Coating gloss
The value of 60°gloss of the coating shall be comply with the contract with a deviation of ±5units.

Coating thickness

Coating hardness
Tested by pencilstrokes, hardness≥1H.

Adhesion
The dry, wet andboiling adhesion of the coating shall reach level 0.

Impact resistance
After impact test,slight cracks are allowed on the coatings, but it is not allowed to have shredson the adhesive tapes.

Salt and acid resistance
After acid and saltresistance test, the surface of the coating after visual inspection shall haveno bubbles or other obvious changes.

Solvent resistance
After solventresistance test, the coating shall not be softened or have other obviouschanges.