tag:blogger.com,1999:blog-697729207783652831.post6650352965975707247..comments2024-03-23T06:51:16.758-07:00Comments on 1000 Woodcuts: The Mysterious Case of Disappearing UltramarineMaria Arango Dienerhttp://www.blogger.com/profile/00920008265178462169noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-697729207783652831.post-22289377717194589602010-03-19T10:47:53.989-07:002010-03-19T10:47:53.989-07:00Test your paper and other materials to see if they...Test your paper and other materials to see if they are acidic, as I recall, Mayer warns that ultramarine fades when in contact with weak acids.Eli Griggshttps://www.blogger.com/profile/07918355002872181016noreply@blogger.com