Dan Welden, master printmaker, painter, author, and educator, will exhibit his largest solo show to date – “Dan Welden: Solo 100” – of 15 paintings and works on canvas and paper at Mitchell-Giddings Fine Arts. On Saturday, Oct. 21 – the show’s opening day – the public is invited to the premier screening of a documentary film, Lasting Impressions: The Dan Welden Documentary, at 3:30 p.m., followed by an opening reception from 5 to 7 p.m. The film, directed by…