Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Terrific book for art historians and collectors to learn about materials

I recommend this book often to art historians and collectors so that they can understand how the materials of a painting, e.g. canvas vs. wood, oil vs. tempera, etc. affect the look of the painting, how paintings change with age (become more transparent, fade, how varnish darkens), and how conservators also may change the look of paintings by conservation treatments. The chapters provide a useful history of materials of Western art, describing the support, grounds, paint films, and coatings. The book tells in clear language what you learn from x-radiographs and examination with ultra-violet light, how to tell that separated panels come from the same altarpiece, or how to recognize if a painting has been cut down or repainted. It was written by an art historian and a conservator working together and should appeal to both groups. Excellent illustrations and information about many well-known artists.