While both publications do not specifically state that mold begins to grow in 24 to 48 hours, this is the generally accepted time frame used by water damage responders to determine when mold begins to grow. So we have the inference from the guidance documents that mold can begin to grow in 24 to 48 hours.
By Material: Drawing with graphite is very different than liquid ink for instance. So you might say, Dry media> Graphite, Charcoal, Pastel, Marker vs. Wet Media> Ink, Watercolor, even diluted Oils and Acrylics. By Technical Approach: Drawing can be Linear or Tonal - drawing contour lines vs. filling color shapes.
Prints in color require two or more blocks, plates, screens or stones, one for each color, printed sequentially on top of each other to produce the final work of art. This process is called registration. Prints can be classified according to the type of surface used to make them. Those with raised printing surfaces are known as relief prints; woodcuts are the most common type of relief print. When the printing surface is below the surface of the plate, the print technique is classified as intaglio. There are several important intaglio techniques. Planographic and stencil methods are also used, and print from a surface that is at the same level as the non-printing surface.