> ... As we are conserving more and more outdoors painted sculptures, we are > looking into acquiring a spectrophotometer and glossmeter ...
There are a number of glossmeters on the market. I have used a Sheen Tri-Glossmaster 20 o/60 o/85o for many years for measuring the gloss of paints and (outdoor) objects, as well as monitoring dust in museums, and am happy with it. My experience is that the 85 o measurement angle is sufficient, but the difference in price is so small, so you might as well buy the three angle version. I chose Sheen at the time because it was the lightest and thus physically easier to handle than the others, but that might have changed. I've seen look alike instruments (perhaps licenced by Sheen?) which cost a lilttle less. You should be aware that such gloss meters require a very flat surface for measurements, and the measurement area is something of the size of a glass microscope slide. If you are going to measure real objects, any curvature of the object or roughness of the paint surface will cause "light leaks" into the gloss meter and may affect your readings. Dr. W. (Bill) Wei Senior Onderzoeker / Senior conservation scientist Rijksdienst voor het Cultureel Erfgoed Hobbemastraat 22 NL-1071 ZCAmsterdam Tel. +31 33 421 7183 Mob. +31 6 5273 2101 ****** Unsubscribe by sending a message to [email protected] Searchable archives: http://cool.conservation-us.org/byform/mailing-lists/cdl/
