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Chrome Machine Roll Defect

SPCoop

Plastic
Joined
Jul 27, 2017
I am currently working on a project for detecting and measuring “Gloss Bands” in laser engraved, chrome plated machine rolls. These “Gloss Bands” are essentially a visual defect that is transferred onto the product. When viewing in certain lighting/angles, the surface of the roll shows variation appearance.

Any explanation for this? Appears the difference in undetectable by Gloss meter, leading me to believe the term “Gloss Bands” may be a misnomer.

Thanks.
 
What kind of variation? Is in the engraved area or the blank surface? Related to the roll(steel) surface? Due to the plating? Have a photo of the roll and then the transferred defect?
 








 
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