Researchers at the Institute of Heritage Restoration and the Polytechnic University (IRP) of Valencia, Spain, are now cleaning the 17th-century frescos using bio-enzymatic cleaners.
The IRP researchers have found that these bio-enzymatic cleaners are able to clean works of art in a fast, specific and respectful way. Besides, these are nontoxic for the restorer and the environment. Bio-enzymatic cleaners are formulated with specific enzymes and bacteria that essentially digest soils. Available in different formulations, bio-enzyme products are typically used to clean restrooms, showers and kitchens, besides, to eliminate odour-causing bacteria in grout and urinal drain pipes.
This project came about because the IRP was having difficulty restoring several murals damaged in a fire at the Church of Santos Juanes in Valencia, Spain in 1936.