A printable product including a substrate including fibers. The substrate has a first side and a second side. At least one of the first side and the second side of the substrate includes a surface layer that does not substantially contain inorganic particles and forms an outermost surface layer of the substrate, which surface layer includes hemicellulose. A method for manufacturing a printable product and to a surface treating agent for treating a substrate including fibers.

This is a potential application for the method to synthesize Janus particles. To learn more about this method, click here [2].