Adhesive Comparison Graph on Horton Ho 229 V3

This image shows the comparison of four samples of adhesive found on the Horten Ho 229 V3 aircraft (spectra 2-5) with a sample of urea formaldehyde (spectra 1). The spectra is largely matching which tells us that the black colored adhesive seen is most likely urea formaldehyde. Analysis by Lauren Horelick and Dr. Odile Madden.