Inspection Standard for Sunglasses Section 1 Measure Requirement
1.0 Critical Measurement Check Points
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-Measurement shall not exceed below tolerance
Tolerance for metal Sunglasses
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Check Points |
Unit |
tolerance |
Check Points |
Unit |
tolerance |
Check Points |
Unit |
tolerance |
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A |
mm |
±0.5 |
Temple Length |
mm |
±2 |
Inclination angle |
degree |
±1 |
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B |
mm |
±0.5 |
Hinge to Hinge distance |
mm |
±1 |
Lens curventure |
degree |
±50 |
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DBL |
mm |
±0.5 |
Tip to Tip distance |
mm |
±2 |
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4 points touch on a flat table |
mm |
±2 |
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Tolerence for non-metal Sunglasses
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Check Points |
Unit |
tolerance |
Check Points |
Unit |
tolerance |
Check Points |
unit |
tolerance |
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A |
mm |
±0.3 |
Temple Length |
mm |
±2 |
Inclination angle |
degree |
±1 |
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B |
mm |
±0.3 |
Hinge to Hinge distance |
mm |
±1 |
Lens curvature |
degree |
±50 |
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DBL |
mm |
±0.3 |
Tip to Tip distance |
mm |
±2 |
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4 points touch on a flat table |
mm |
±2 |
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1.1 Measuring Methods
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Size Measurement |
Full Rim |
Semi-Rimless/Rimless |
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A |
The longest width of the lenses |
+1.0mm |
-- |
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B |
The distance between the top of the lenses to the bottom |
+1.0mm |
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DBL |
The distance of the bridge between the lens |
-1.0mm |
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Temple |
The length of the temple arm including the portion going behine the ear |
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DBL =Distance between length
Scetion 2 Acceptance Criteria in Cosmetic Aspects
2.0 Perform a VISUAL CHECK
Styles,colors,printings should stick to the order,confirmed by order file,drawing & samples
A -Frame should be clean,no marks or inclusions.
B -Frame color should match specification,no color fade,paint peeling or chipping.
(Apply tape test to make sure it does not come off easily)
C -Frame surface should be smooth,no pit marks,dots,scratches or scuffs,
D -No sharp edges.
E -Metal Frame should not have excess soldering or shading fluid.
F -Logo is in a proper place.It does not easily rub off.
G -Frame alignment should be good and symmetrical.
(When laid on a flat surface,both tips and bottom of the front have to touch the surface.Turn it upside down and repeat the same)
H -Lens should be affixed properly,no gaps,loose or lens popping out.
(Left and Right lens color should be the same)
I -Frame markings should match specification.
2.1 Acceptance level for different parts
-It can be spearated into two different parts:”C”Critical part"M"-most important part "L"-less improtant part
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Surface A-Front side C |
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Surface B-side&top M |
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Surface C-inside &button L |
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2.2 Common Defects
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Defects |
illustration |
Surface A |
Surface B |
Surface C |
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Defects |
illustration |
Surface A |
Surface B |
Surface C |
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REMARK:
1)Surface A-accept only one defect on the same frame
2)Surface B&C-accept no more than two defects on the same frame
Scetion 3 Acceptance Criteria for Lenses
3.0 Standard Sun Lenses Criteria (TAC/AC)
3.1 Physical Characteristics
A-Correct Lens material
B-Appropriate thickness at the center and edges
C-Base-curvature must be within ±0.25D wire frame and ±0.75D for plastic frame
D -No chips,flakes,scratches
E-No Waves or other irregularities
F-FDA drop ball test pass on impact resistant,Lens testing Satified European Standard/EN iso 12312-1:2023,American National Standard/ANSI Z80.3-2018,AS/NZS standard AS/ZNS 1067.1.2016.
G-Optical performance test (prism degree, polarization degree, top focus of cylindrical mirror and spherical mirror
3.2 Catergory of Lenses
A-Category must be as specified within tech pack per sunglass,this should only be within Cat.2 and Cat.3 only.
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TRANSMISSION |
DESCRIPTION |
USAGE |
CAT |
Selected |
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80-100% |
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0 |
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43%80% |
General Purpose Sunglasses |
Light portection against sun glare |
1 |
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18%-43% |
General Purpose Sunglasses |
Good protection against sun glare |
2 |
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8%-18% |
General Purpose Sunglasses |
High protection against sun glare |
3 |
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3%-8% |
Not suitable for road use and driving |
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4 |
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3.3 Acceptance level for different lens zone
Zone A--a circle 35mm in diameter aound the optical center
Zone B--apart from zone
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3.4 Comment Defects
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Defects |
Illustration |
Zone A |
Zone B |
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Remark:
1)Zone A-accept only one defect on the same frame
2)Zone B-accept no more than two defects on the same frame
3)Slight colour variation in lenses only is acceptable between batches only within variance.
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Defects |
Illustration |
Zone A |
Zone B |
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Section 4 Assembly Requirement
4.0 Sunglasses assembly
4.01-Components,Logo,nosepad and Lenses fitting in frame properly and securely.
4.02-Adjust into symmetrical alignment per approved technical drawing.
4.03-Check gaps between the lug and temple.Gaps must not exceed 0.3mm
4.04-Hinge force should work properly without sticking
4.05-Temples tightened so they don't "Hop"closed
4.05-The gap inside temple-end or tip-end should not exceed 2mm and should not easily come off
4.06-Tightness of temples must match together in the pair
4.07-Smooth Edge treatments,no sharp edge on frame
4.09-No extra materials attached/inside or on sunglasses
4.10-No fingerprints embeded or on the sunglasses
4.1 Common defects
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Defects |
Illustration |
Acceptability |
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4.2 Lenses Assembling
Framed style
-Check groove accuracy and depth
-Lens is installed in frame:
no gaps around the edges where light can be seen between lens &frame
no lens pop out while fully extended the hinge or twist temple right up and down(up to 1 inche vertically) no waves or stress cracking
Frameless style
-Drill holes perpendicular without chips,cracks,etc (drawing 1s)
-Screw in proper length (no exceed 0.5mm)
-A poly washer should be installed in between lens and screw
-Mounting is secure,not too tight or loose
Drawing 1:
4.3 Metal studs assembling
-Stone/Metal studs should firmly glued or secured
-Drill hole in the same depth
-Apply tape test to make sure it does not come off easily
4.4 Drop Testing
-Dropping 4 pairs,3 times each to make sure all components still intact
Section 5 Package Requirement
5.1 Carton
A-Mark&side mark check
B-Complete conditin of th carton check, no damage
5.2 Inner box
A-side mark check
5.3 Custom package
A-Inspect packing as required by customers
5.4 Common defects
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