Nineteenth-century craftspeople made do with what they had. In Denmark, they had beer leftovers.
C.W. Eckersberg's painting"The 84-Gun Danish Warship Dronning Marie in the Sound” contains beer byproducts in its canvas primer.Behind a beautiful oil-on-canvas painting is, well, its canvas. To most art museum visitors, that fabric might be no more than an afterthought. But the canvas and its chemical composition are tremendously important to scientists and conservators who devote their lives to studying and caring for works of art.
The authors did not set out in search of brewing proteins. Instead, they sought traces of animal-based glue, which they knew was used to prepare canvases. Conservators care about animal glue since it reacts poorly with humid air, potentially cracking and deforming paintings over the decades.
The authors considered the possibility that stray proteins might have contaminated the canvas from the air. But three of the paintings contained virtually no brewer’s proteins at all, while the other seven contained too much protein for contamination to reasonably explain., a biochemist at the University of Copenhagen in Denmark, and another of the authors.
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