Fig 4 - Analysis and Cleaning Tests of Zinc-type Haze on Oil-based Portrait Paintings of the Peranakans Mr And Mrs Tan Beng Wan
Close-up images of the haze on Portrait of Mrs Tan Beng Wan. (a) 5-White haze at top left corner in background. (b) 6-White haze at left of chair. Upper row shows camera images. Bottom row shows digital microscopic images at 500x magnification.