The ambient illumination is 200±50 LUX, the viewing distance is 25-30cm, and it is 45o visual product. The A-level surface is 8 seconds, the B-level surface is 6 seconds, and the C-level surface is 4 seconds.
(A side: the range in which the line of sight is often in contact under basic use conditions, such as the front of the product Side B: The range in which the line of sight will occasionally touch under basic use. Such as the side and back of the productC-face: The range in which the line of sight will not touch under basic use, but will be seen after opening. Such as Inside the lower case, inside the battery hole.
●The surface should be clean and light, and there should be no stains, scratches, cracks, discoloration, deformation, burrs and loose structures.
●All signs should be clearly visible, will not cause misunderstanding, and are not easy to erase; labels should not be picked up or fallen off
●All graphics, texts, and symbols must not have ghosting, missing characters, less scratches, and blurring.
Rubber friction test
● Use a special eraser, add 500g force, shell coating 20 round trips, shell and button silk screen 15 round trips, laser engraving 30 round trips
● 40 times / minute ~ 60 times / minute, 20 mm stroke.
● Rubber model: 7017R.
Samples qty: 3pcs
1) The coating of the shell does not allow the appearance of different colors and exposed substrates;
2) Printing allows the font to be slightly worn and faded, but it is required to be qualified when the print is not worn through the bottom, and the font content is still intact and clearly recognizable;
3) Printing allows for a single linear deletion due to individual coarse gravel in the rubber, but does not cause missing or significant interruption of the font strokes.strokes or obvious interruption
Alcohol wear test
● surface decoration layer: elastic paint, 95% medical anhydrous alcohol, 5N pressure, 50 reciprocations;UV paint, PU paint, electroplating, 95% medical anhydrous alcohol, 5N pressure, 50 reciprocation;
● screen printing layer: 95% medical anhydrous alcohol, 5N pressure, 35 times reciprocation;
● radium carving: 95% medical anhydrous alcohol, 5N pressure, 50 times reciprocation;
Sample quantity: 3pcs
Special tester (the area of test head is about 1cm2 after the test head is wrapped with cotton cloth)
After the completion of the test, the test surface shall be qualified when there is no obvious fading and bottom penetration (exposing the bottom material)