I've had the misfortune of discovering two of the most popular heat tools have recently been "improved" by lowering the wattage. In fact, I just shipped one back today because the wattage was so low I couldn't get Judikins embossing powder on Staz-on ink to melt at all. Yes, Stazon is a dye ink, my old heat tool had no problem because I worked fast. I also heat emboss VersaFine(a dye ink) all the time.
The other heat tool brand is now two heats, the first of which is such low wattage, it's useless. The wattage of the main heat has been lowered by 50 watts and just really slows down the heat-embossing process.
So if your heat tool is old, protect it so you won't have to have a low-wattage one that eats crafting time
Why are wattages printed on the boxes of hair dryers but not on crafter's heat tools, I wonder. If it's less than 350 watts, I would know enough not to buy it.