Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Chrome Roller Defect

Chrome Roller Defect

Chrome Roller Defect

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

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


RE: Chrome Roller Defect

Is the gloss meter the 45 degree in and 90 degree measurement type?

If so, they are not very good at detecting small variations. The eye is much better at that. What the meter is good at is to produce a measurement. But its resolution (ability to detect small variation) is crude. You may need to use a device that uses one or several angles to detect scattered light. And you will need as much light input as you can get from an LED. A collimator lens also usually does a lot good.

Gunnar Englund
Half full - Half empty? I don't mind. It's what in it that counts.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close