This looks like a great way of restoring a lot of text, especially if it is not black. I found a video on how they make these dry rub on transfer sheets, it is a very similar process to silk screening where a layer of photosensitive emulsion is used with a mask to form the sheet. Looks labour intensive and no doubt accounts for the hefty price. I suppose it is with rub on transfers (Letraset) that silk screen films were originally lettered in the first place?