We have done a device operation comparison test between the needle-cartridge device made by bioEvolution and the standard device (in the same categories: speed, pressure and angle). In both cases single needles were used. While using the bioEvolution device, we had obtained a smooth, even and straight line and precise punctures without any skipping to the side. This way we minimise skin injuries and any possible bleeding. The procedure is practically painless. Due to the Intel microprocessor, which provides the stable frequency and power during use, such results could be obtained, despite the diversified structure of the skin. The rotary motion of the needle during dye injection guarantees precise pigment injection into the skin.

When it came time to use a traditional device, the lines are uneven and have a tendency to deflect to one side. In some parts of the line the needle did not even touch the paper. The device was simply too weak due to insufficient power. As a result, we can observe uneven pigment injection and distribution, visible damage to the skin and even some minor bleeding.