In reply to:

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i thought it was made by an CNC router, why are the eges not clear???

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A CNC router still uses a rotating blade (a bit) to do the cutting. The edges aren't clear because of the tiny scratches and imperfections left behind by the bit. To make it clear would require an additional stage of polishing. The blade does not (cannot?) leave a perfectly smooth finish behind due to vibration, heat build up and other factors.

Stu