LED material : brand - status T2/1100-H18 T2/3300 H18.

T2/1100-H24 copper layer: 10% 15%.

Common specifications: thickness: 1.5 +-0.05 width: 610 0, +2.

Length: 0, +3 diagonal: <=3.

Common appearance benchmarks:

Scratches: no scratch on the aluminum surface can be done, while the slight feel of the copper surface does not affect the appearance.

Plate type: visual level, wave height should not exceed 3% of short edge;

Laminating: flat, no bubble, crease phenomenon;

Burr: the end of the base plate should not have the feel of the hand, obviously burr, the height must not exceed 0.3mm;

Adhesive aluminum: not allowed to be polished, can be used for grinding, fine cloth can be polished easily, without affecting the appearance of the release;

Bare aluminum : not allow ;

Black silk: it is not allowed to be polished, but it can be polished and judged. It can be released when it has no pit point and does not affect the appearance.

Pit: the copper surface is not allowed, the diameter of the aluminum surface is not allowed >0.5mm and no more than 3 on each side;

Layer: not allowed;

Copper content deviation: +-1% (10% for copper layer)

Other: batch defects inconsistent with normal, report to superiors;