STRUCTURE
|
TOP 2/BACK 1
TEST ITEM
|
TOP
|
BACK
|
PAINT THICKNESS
|
>5+18
|
5-7
|
GLOSSY
|
high 70±5/middle50土5/low30±5
|
35±5
|
COATING HARDNESS
|
≥H
|
≥H
|
T BELT
|
≤3T
|
≤4T
|
IMPACT RESISTANCE
|
≥9J
|
≥6J
|
DISSOLVENT RESISTANCE
|
≥100
|
≥50
|
SALT SPAY TEST
|
≥720hr
|
|
ACID RESISTANCE
|
SOAKED IN 5% HCL SOLUTION FOR 300HR WHITHOUT BLISTERING, COLOR FADING AND COATING PEEL-OFF
|
ALKALI RESISTANCE
|
SOAKED IN 5% NAOH SOLUTION FOR 300HR WHITHOUT BLISTERING, COLOR FADING AND COATING PEEL-OFF
|
|