UV Marking Pen
By contrast, UV-marking pens are in the form of thick "wax crayons something similar to felt tip pens.
The marking pens serve to mark the desired position, and the mark thus applied is then pressed or ironed with a warm iron, so that the wax melts and diffuses into the cloth. After this stage, the mark is not visible to the eye. Naturally, such UV-cartridges or marking pens can be used only with woollen or wool/mixture fabrics. The wax must be absorbed by the fibres and wool does this best of all.
If such UV-preparations were applied to pure cotton or pure polyester fabrics, a stain would inevitably remain after pressing.
