Standard of Appearance

Definition of the Defect Level
  • Critical Defects: There exits the defects which pose a threat to the personal and property safety of the users.
  • Major Defects: The functional defect influences the normal usage; the performance parameters do not meet the design specification and national standard; the minor defects in the structure and appearance which may be hard for the customers to accept
  • Minor Defects: The minor defects in the structure and appearance which may be hard for the customers to accept.
Definition of the Defect Level
Critical Defect There exits the defects which pose a threat to the personal and property safety of the users. Examples: Power leakage of the charger,liquid leakage of the battery, strike and smoke of the charger and the battery.
Major Defect Functions Examples: Cannot start/power off the mobile phone, cannot log in network, cannot read SIM card, cannot call, cannot charge, No in-call nor out-call, lower sound, echo, brown-out, off-line, abnormality in receiving/sending message,etc.
Package Lack of accessories, instruction specification, guarantee card.
Wrong mobile phone, accessories.
Lack of label or wrong label.
Others Serious appearance defects exceed standard.
Minor Defect Defects that do not influence normal use Lack of Lens protective coating, no package bag, no or wrong colorful label, no seal cover on the certification.
Defects that influence phones and accessories apperance uneven on the keys, scratch, wrinkle, not-standard labe of the phones,etc.
Defects that influence phones packing appearance Dirty/damaged/wrinkle instruction specification,guarantee card/colorful package box; strange identification with no misunderstanding.
Definition of the Defects
Third Level Scratch  Slight scratch, hard to see when no reflect light, see the scratch with a fixed point of view. 
Second Level Scratch  Slight scratch by hard knock and can be seen even in a no-turning point of view. 
First Level Scratch  Heavy scratch by hard knock and can be seen even in a no-turning point of view. 
Color Point  Discoloration Point, the size is the biggest diameter when measuring. 
Step  The step after assembling all parts. 
Gap  The gap after assembling all parts.  
Impurities  The line or point formed when painting meets foreign. 
Height  The height is over the standard after assembling the decoration and LENS. 
Off Paint  Plating peel off. 
Foaming  As the raw material is not sufficiently dried before molding, the moisture vaporized at high temperatures to form foaming in the resin. 
Flow Line  The ring stripes appear on the product surface focusing on pouring gate. 
weld line  When the plastic melt flow in the cavity, encounters obstructions (such as cores and other objects), the melt is not well integrated after bypassing the obstruction, so there will be a distinct line formed in the surface of the plastic parts, it call weld line. 
Color Pale  The color is pale when graphic painting. 
Trimming  Because of injection or mould, some slitter edge appears around the plastic parts. 
Color Difference  Plastic parts surface looks like in a different color from standard sample which is approved by customers. There are big and small color difference. 
Definition of Surface
  • A surface: only during the process of usage, watch and expose the main surface directly near (the front side of the mobile phones when observing normally).
  • B surface: only during the process of the usage, not watch directly but expose to the secondary surface(the upper, lower, right and left side and backside of the mobile phones).
  • C surface: very rare or the surface which cannot be seen during the process of the usage(the inner side of the back of the mobile phones, battery, and other surfaces of the batteries).
Inspection Condition of the Appearance Defects
Lighting  fluorescent lamp 
Distance  the inspection distance from inspectors’ eyes to surface is 30cm. 
Basic Condition of the Inspectors  The monocular vision of the normal  open hole (or the corrected vision) shall not be lower than 1.0 (No color blindness).  
Time  No more than 8 seconds. 
Position  45°,and swing 15° up, down, right and left. 
With the above conditions, defect items are those visible negative phenomena from visual inspection.   
Inspection Method and Judgment Standard
    Based on GB2828.1-2003 General Inspection Level Ⅱ。AQL:Critical: 0; Major: 0.65; Minor: 1.5
Inspection Standard of Phone Handset Appearance
Serial Inspection Content Inspection Standard CRI MAJ MIN
1 Handset face and bottom shell assembly The gap between face sell and bottom shell >0.25mm or step > 0.2mm.    
2 LENS The gap between housing > 0.25mm    
The step between LENS and turn-over or turn-down > 0.2mm    
The LENS screen printing: font and image disconnnet with burr and defect    
3 Key Decoration Tilt,the buttons is obvious to fall off and bump, and the gap between with around > 0.25mm    
4 Battery Assembly It is not easy for attery assembly and dyestuff, too loose or too tight    
The gap between with handset > 0.25mm, the step between with left and right sides > 0.2mm    
5 Jack Socket The gap between with handset > 0.25mm    
It is hard to plug in and pull out because of wrong installation    
Transformation, rust, mildew but not effect fuctions.    
6 Antenna Tilt obviously      
The gap between handset bottom shell > 0.25mm      
The angle does not twist correctly ≥90°    
7 Decoration The gap between with housing > 0.25mm    
The step between housing > 0.2mm    
Plating rusts, peel off and discolor    
8 SIM Set Losse,transformation, rus and mildew but not effect functions    
9 Others Leak screw or other parts    
The screw is not in the right position, or defective, the area of painting off is less than the surface's 1%.    
Standard for Judging the Point (Including Color Point and Scratch Point) Defect
Measuring Plane Color Point Width(mm) Acceptance Number Remarks
Obvious Color Difference Unobvious Color Difference
A ≤0.1 1 2 Distance between two points≥20mm
≤0.2 0 1
B ≤0.2 2 3
0.2~0.3 1 2
C ≤0.2 2 4
0.2~0.4 2 3
Standard for Judging the Linear Defects (Including Scratch and Fibers)
Measuring Plane Width (mm) Length(mm) Acceptance Number Remarks
First Level Scratch Second Level Scratch Third Level Scratch
A ≤0.1 0.3~1.0 0 1 2 Distance between defects≥20mm
B ≤0.1 0.3~5.0 1 2 3
0.1~0.2 0.3~5.0 0 1 2
C ≤0.1 0.3~5.0 2 4 6
0.1~0.2 0.3~5.0 1 2 3
Comments: Acceptance number of point and linear defects for one mobile phone: A - 2pcs, B - 3pcs, C - 4pcs