A multi purpose heat gun is a very useful tool and should form part of your crafting or DIY toolbox. There are special heat guns (also known as heat tools) that have been designed for craft projects for techniques such as heat embossing.
Be very careful to check the heat settings and make sure that you do not use a builder's multi purpose heat gun which reaches too high a heat.
Other Heat Sources
Rubber stampers are a creative breed, and those without heat tools have experimented with other heat sources. Hairdryers, for instance, are reported to have been used with success, although some stampers find that hair dryers blow the embossing powder around too much for reliable results.
A naked electric incandescent light bulb generates a surprising amount of spot heat and this can be a useful fall-back if you need to heat a small area. Hold the paper or card above the light bulb, but watch like a hawk to ensure the paper does not burn.
Other heat sources may be suitable for use in emergencies, however, these are not recommended for beginner rubber stampers. These other methods of heating embossing powders may generate inconsistent and unreliable results and could end up spoiling a project.
In addition to these, there are a variety of other craft heat guns and heat tools available that can be used to successfully emboss rubber stamped images. You will find multi purpose heat guns and heat tools in craft stores and online.