First of all, electrocoagulation pen is a tool to realize painting and carving by using electrothermal effect. It uses electric energy to heat the nib, and the temperature of the nib is as high as several hundred degrees. It can make the pen tip contact with drawing paper, wood board and other materials, so that the materials can melt or burn instantly, thus forming the effect of painting or carving. The pen has high precision and fineness, and is suitable for fine and meticulous works such as lines, figures and details. It can be used on different materials, such as paper, wood, leather and so on.
Hot brush is a tool to realize painting by using heat conduction effect. It heats the nib, and the temperature of the nib is usually around 100 degrees. Then the pen tip contacts with the pattern or heat transfer paper, and the pigment or metal foil is transferred to the drawing paper through heat conduction. Hot brush is suitable for metal foil hot stamping, hot stamping paper painting and other works, with bright effect and a certain three-dimensional effect. Thermal brushes are usually used for paper, fabric, leather and other materials.
Generally speaking, both electrocoagulation pen and hot brush can produce thermal effect to achieve painting effect, but the use method and application scope are slightly different. The gel pen is suitable for fine and meticulous works, and the hot brush is suitable for drawing metal foil and heat transfer paper. Which tool to choose depends on personal needs and painting style. I hope this answer is helpful to you.