If you want to give it a very technical definition, a heat press machine is basically a machine that allows you to transfer a graphic design onto a substrate material by the application of heat. A substrate is basically a fancy word for an underlying layer.
This substrate, in most cases, is generally something like a t-shirt, a mug, a mouse pad, a cap, etc. Basically, a heat press machine allows you to transfer a graphic design onto a material on which you want it printed.
You might have seen those t-shirts and mugs that people often gift guests at a party or those memorabilia items that you get during a special sporting event. These are all made using heat press machines.
To sum it up in simpler words, a heat press machine is a device that applies heat and pressure on to a graphic design and allows you to have it imprinted on another surface. A heat press machine can be used to print a design on garments, glass, wood, or even metal surfaces in some cases.
These machines come with two plates inside them, called platens. The upper platen heats up and then you can set the time, temperature, and pressure that has to be applied to get your graphic printed. In many modern-day heat pressing machines, you can actually set these factors digitally.
There are a number of other ways in which you can print a graphic design onto a t-shirt. These include screen printing, direct-to-garment (DTG) methods, as well as vinyl cutting. However, heat press machines have proven to be much faster and actually quite easier to use and are very popular among those who wish to print custom designs on various objects.
