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!
For unlimited access to all free content on our site, take 2 minutes to register now. You’ll have a wealth of searchable resources at your fingertips, including news, technical articles, videos, webinars, problem-solving forums and much more.
PLUS: You can sign up for a FREE 3-month trial subscription to the Journal of Protective Coatings & Linings, the voice of SSPC.