Good Technical Practice
Problem Solved: My Paint Looks Bad — Can I Prove It Has Faded?

From D+D Print, Fall 2017

By Kenneth A. Trimber, KTA-Tator Inc.

Is there a way to prove the paint on your building has faded and become dull, and if it has, do you have any recourse?...

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Tagged categories: ASTM; Chalking; Coatings manufacturers; Color; Color retention; Exterior Wall Coatings; Gloss and color; Gloss retention; Instruments; Ken Trimber; KTA-Tator; Meters and gauges; Testing + Evaluation; Warranties; Weathering

Comment from Jeffrey McIntyre, (1/5/2018, 11:40 AM)

The Gloss Photo caption statement should reference 20-degree angle not 85-degree for high gloss substrates. " Since the value at 60 degrees is greater than 70 units, ASTM D526 recommends using the 85-degree incidence angle for the readings." Also, some of the MPI Gloss Levels in Table 1 do have a 20-degree value range in their criteria.

Comment from Kenneth Trimber, (1/5/2018, 12:27 PM)

Thanks Jeffrey, good comments. D+D please change 85-degree to 20-degree in the caption under the gloss photo. Regarding the MPI table, my goal was to demonstrate how MPI uses levels to describe gloss rather than descriptive terms. I selected 60-degrees to show the distinctions between the levels since MPI shows 60-degrees for all of them.. MPI also shows sheen at 85-degrees for the lower gloss levels, which I didn't include.

Comment from Brandy Hadden, (1/5/2018, 12:43 PM)

That value has been changed. Thank you for reading closely!

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