How are the images recorded on the cloth?
A thin amorphous film, as thin as anti-glare coatings on eyeglasses, coats some of the outermost fibers of the cloth. In discrete places, this otherwise clear coating of starch fractions and saccharides has undergone a chemical change. The chromophores of these newly formed complex, conjugated double carbon bonds appear straw-yellow. Chemically, they resemble a Maillard product.
