Adhesive Inclusions

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This sample of urea formaldehyde adhesive came from inbetween the plywood on the Horten Ho 229 V3 and was photographed with transmitted light using a Hirox KH-7700 digital microscope. Note the colorful inclusions and the opaque white adhesive matrix. The image at the left shows the distribution of small black particles, and the image on the right shows measurements of the different inclusions. Image: Anna Weiss, 2014