At LA TIENDA DEL ROLLO, we are specialists in thermal paper, and 90% of the products sold here belong to this type of paper. To learn a little more about this product, which is used in any type of commerce and is absolutely essential for your day-to-day business, we are going to “roll up our sleeves” and the first theory class on Thermal Paper is on us: Thermal Paper, also known as “chemical paper” or “thermal roll” is a special type of paper reactive to heat, which is printed using the “direct thermal printing” method. This means that is printed by heat, without ink. A thermal paper has two sides,or faces, front and back. The front is covered with a slightly glossy coating, while the reverse side is opaque. When a heat source is applied to the underside (the opaque side), the front side darkens just where we have applied heat, just as if it were burned. To check how these layers work, it is as simple as bringing a lighter flame close to the back of the paper (always without contact). We will see how the upper part of the paper automatically turns black. Another way to check if a paper is thermal is making the shiny part (obverse) with a coin, key or even with the fingernail. This way we can see if a paper is thermal or not.