Then why add sides?
The reason is that after the thermal transfer pattern is printed, it needs to be contoured on the engraving machine before it can be transferred to the clothes. If the background color is not added, there may be deviations when walking the contours, even if it is a slight deviation, the pattern will not appear. It looks good, if you don’t add background colors like hair, text, it’s definitely impossible to make precise carvings. As far as I know, this is a common practice.
Reminder: In ordinary heat transfer, not all patterns will be added with a background color, such as a very regular rectangle, square, circle, etc., you don’t need to add it.
In fact, as for whether to add a background color, each customer’s understanding is different, and some customers explicitly request to add a stroke (that is, add a background color).
In fact, there is another kind of printing, which is digital printing, which directly prints the pattern on the clothes, and this is printed by a dedicated printer, which is relatively expensive.
Some patterns do not have to use thermal transfer, generally, if there is no gradient, silkscreen is also a good choice.
