Tag: paper

Why do pages on Old Books turn yellow?

Paper is made out of wood pulp which contains cellulose. Another organic substance binding the cells, fibers and vessels that constitute wood, is LIGNIN. Apparently, it is the most abundant renewable carbon source after cellulose. Cellulose, a colourless substance, is remarkably good at reflecting light, which means we see it as being white. To make a fine white paper (Bond… Read more →