A: The patent refers to the wax paper backing that is loosely adhered to the back of the gold leaf. This type of gold is also known as transfer gold, because the gold is picked up by the wax paper, placed gold side down onto the adhesive and then the wax paper backing is peeled away. This makes gilding easy and is an imperative, if the gold is used in the windy outdoors.
The other gold is known as surface gold and does not have the wax paper backing. This loose gold needs to be picked up and transferred to the surface with gilding tip.
Both are genuine gold leaf.