0:00:23.940,0:00:27.739 Voiceover: Here at the University of Michigan Museum of Art, 0:00:27.900,0:00:31.324 paintings on silk and paper from private collectors, 0:00:31.400,0:00:35.294 art museums around the country, and our own renowned collections, 0:00:35.310,0:00:38.869 are treated, remounted and conserved at the 0:00:38.870,0:00:42.319 Robert B. Jacobs Asian Art Conservation Lab. 0:00:43.040,0:00:45.879 The Museum of Art's Asian art holdings include 0:00:45.880,0:00:48.764 nearly 400 Chinese and Japanese paintings, 0:00:48.920,0:00:51.089 and almost 1,000 prints and drawings. 0:00:58.180,0:01:03.949 Kewai Wang: Asian paintings can survive for centuries, but over such a long time, 0:01:03.950,0:01:09.849 they can be damaged by careless handling, changes in humidity, 0:01:09.880,0:01:13.899 too much exposure to sunlight, and even insects. 0:01:19.920,0:01:23.989 Voiceover: Before treatment, conservator Kewei Wang considers the 0:01:23.990,0:01:27.444 style and age of the painting, print, or drawing. 0:01:27.770,0:01:30.489 The condition must be carefully documented. 0:01:31.500,0:01:34.354 She will intervene as minimally as possible, 0:01:34.530,0:01:37.974 and will develop treatment options to extend the life of the work, 0:01:38.100,0:01:42.199 rather than make it look new. Yet, serious damage needs to be treated 0:01:42.330,0:01:47.189 to preserve the work of the artist. And the results can be dramatic. 0:01:49.220,0:01:53.629 Even this Chinese scroll, approximately 150 years old, 0:01:53.840,0:01:58.229 and badly deteriorated, can be restored in our laboratory. 0:01:58.740,0:02:01.509 Kewai Wang: The painting must be stapled and secured, 0:02:01.510,0:02:04.749 and the structure must be sound. 0:02:04.770,0:02:08.589 My condition assessment helps to determine 0:02:08.590,0:02:14.939 a customized treatment plan. 0:02:16.070,0:02:19.069 Voiceover: A light table is used for detailed repair work. 0:02:19.150,0:02:21.549 All structural repairs to the work should be done 0:02:21.550,0:02:24.144 from the back to leave the pigment undisturbed. 0:02:24.450,0:02:27.889 Here, damage from a worm hole is being repaired. 0:02:29.320,0:02:32.579 A rinse of purified water helps to gently cleanse 0:02:32.580,0:02:34.999 surface dirt and remove backing papers. 0:02:35.400,0:02:37.879 Washing is a necessary procedure for every 0:02:37.880,0:02:39.849 painting that's to be remounted. 0:02:41.180,0:02:44.389 Once moistened, the backing is removed from the painting, 0:02:44.860,0:02:47.379 and the work can be stabilized and reinforced 0:02:47.380,0:02:48.964 with new backing material. 0:02:49.260,0:02:52.439 Mounting silks are chosen to enhance the visual appeal 0:02:52.440,0:02:55.449 of the artwork and match the style of the original. 0:02:56.910,0:02:59.729 Occasionally, end painting is used to minimize 0:02:59.730,0:03:02.369 the effects of previous damage to the surface, 0:03:02.650,0:03:04.244 from abrasions or scratches, 0:03:04.450,0:03:07.019 or when pigment has begun cracking or flaking. 0:03:07.430,0:03:09.939 Small amounts of paint are skillfully applied 0:03:09.940,0:03:12.614 to fill cracks or repair surface blemishes. 0:03:12.880,0:03:15.134 While the lab specializes in Asian art, 0:03:15.180,0:03:18.529 the same techniques also are used to restore Western 0:03:18.530,0:03:22.989 works of art here in our museum's conservation lab. 0:03:23.160,0:03:27.209 The treatment process may require six months to a year to complete, 0:03:27.760,0:03:31.379 but the time and investment are critical in order 0:03:31.380,0:03:34.809 to preserve the historical integrity of these priceless 0:03:34.810,0:03:38.460 works of art for generations to come.