1. Technical Field
The exemplary disclosure generally relates to a surface treatment method for substrate, especially to a surface treatment method which makes the substrate present gradually changing colors and a coated article manufactured by the method.
2. Description of Related Art
Housings of portable electronic devices may be decorated by forming layers which have gradually changing colors on the housings. The layer may be formed by printing using an automatic gradually changing printing machine. However, when the layer has a small area, the color difference between different regions of the layer cannot present a strong contrast. Another conventional way to form the layer may be carried out by respectively printing different color inks on different regions of the surface of the housing. However, the junction of each two different colors usually presents an unnatural transitivity.
Therefore, there is room for improvement within the art.
Many aspects of the embodiments may be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the exemplary disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. Wherever possible, the same reference numbers are used throughout the drawings to refer to the same or like elements of an embodiment.
Referring to
A substrate 11 is provided. The substrate 11 may be made of metal or non-metal.
The substrate 11 is degreased to remove contaminants of the substrate 11, such as grease or dirt.
A color layer 13 is formed on the substrate 11 by printing or spraying. The color layer 13 includes a first region 131 and a second region 133. The first region 131 is adjacent to the second region 133, and a junction 135 is formed between the first and second regions. The color of the first region 131 is different from the second area 133. The first region 131 has gradually changing colors. The second area 133 has other gradually changing colors.
A paint layer 15 has a matt appearance is sprayed on the color layer 13. The paint layer 15 is translucent. The thickness of the paint layer 15 is gradually decreasing from near the junction 135 to away from the junction 135. The thickness of the paint layer 15 at the junction 135 is about 4-4.5 μm.
The paint layer 15 is formed by the following steps:
Referring to
The shielding element 20 is positioned on the substrate 11, allowing the center portion of the shielding element 20 to cover on the junction 135.
A spray gun (not shown) and a paint having a matt appearance are provided. The paint is sprayed on the substrate 11 through the through holes 21 by the spray gun. During spraying, the distance between the substrate 11 and the spray gun is about 10 cm to about 20 cm. After spraying, the paint is solidified at an internal oven temperature of about 75-95° C. for about 40-50 min.
Referring to
Referring to
The substrate 11 may be made of metal or non-metal.
The color layer 13 includes a first region 131 and a second region 133. The color layer 13 includes a first region 131 and a second region 133. The first region 131 is adjacent to the second region 133, and a junction 135 is formed between the first and second regions. The color of the first region 131 is different from the second area 133. The color of the first region 131 is different from the second area 133. The first region 131 has gradually changing colors, the second area 133 has another gradually changing colors.
The paint layer 15 is translucent. The paint layer 15 is a continuous layer. The thickness of the paint layer 15 gradually decreases with the distance from the junction 135 to the two opposite sides of the color layer 13. The thickness of the paint layer 15 is greatest at the junction 135 with the thickness about 4-4.5 μm.
Referring to
The thickness of the paint layer 15 which has a matt appearance gradually decreasing with the distance from the junction 135 to the two opposite sides of the color layer 13, and thus is blurred in the area of the junction 135 due to the greatest thickness of the paint layer 15 and provides the coated article 10/10a with an appearance of more naturally gradually changing colors. Furthermore, the surface treatment method is simple.
It is to be understood, however, that even through numerous characteristics and advantages of the exemplary disclosure have been set forth in the foregoing description, together with details of the system and function of the disclosure, the disclosure is illustrative only, and changes may be made in detail, especially in the matters of shape, size, and arrangement of parts within the principles of the disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Number | Date | Country | Kind |
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201210087719.4 | Mar 2012 | CN | national |