Serial Number

Item

Index

Test Method

1.1

State in Container

No foreign matter, no lumps, gently stirred evenly.

Visual Inspection

1.2

Original paint viscosity, S (4 cup/20℃)

80~100

GB/T1723-1993 Method B

1.3

Original paint fineness, μm

≤15

GB/T1723-1979

1.4

Non-volatile content,

% (105±2)℃/2h/approximately 2g

≥60 (white paint) ≥50 (other paints)

GB/T1725-2007

1.5

Storage stability (5~30℃) 1 year

No abnormal changes

GB6753.3-1986

Serial Number

Item

Index

2.1

Coating film baking conditions

70-80℃×30min

2.2

Matching curing agent

Topcoat curing agent

2.3

Mixing ratio

Main paint: curing agent = 2:1

2.4

Thinner

BXM-17

2.5

Dilution rate, 16~22s (4 cup)

Thinner addition amount is 10%~30%

2.6

Leveling time, min

>10

Serial Number

Item

Index

Test Method

3.1

Film color and appearance

Meets standard board color difference range, smooth and flat.

Visual Inspection

3.2

Flexibility, mm

<=1

GB/T1731-1993

3.3

Scratch test, grade

<=1

GB9286-1998

3.4

Pencil hardness (scratch)

> = HB

GB6739-2006

3.5

Gloss (60°), unit value

> =90

GB9754-2007

3.6

Water resistance

(Immersion in distilled water at 40±2℃ for 240h)

No bubbling, slight discoloration and loss of gloss allowed, adhesion level grade 1.

GB/T1733-1993 Method A

3.7

Acid resistance

(Immersion in a solution of 0.1N sulfuric acid for 24h)

No bubbling, no wrinkling, slight discoloration and loss of gloss allowed, adhesion level grade 1.

GB/T9274-1988 Method A

3.8

Alkali resistance

(Immersion in a solution of NaOH for 24h)

No bubbling, no wrinkling, slight discoloration and loss of gloss allowed, adhesion level grade 1.

GB/T9274-1988 Method A

3.9

(Artificial climate (xenon lamp) aging for1500h)

% gloss loss ≤15%, slight discoloration allowed.

(△E≤3.0NBS)

GB/T1865-2009