Dip-coating is used predominantly by smaller manufacturers of windows. The process involves dipping the window frame into a bath of coating material and then turning it several times. The excess paint or varnish simply drips back into the bath. In the next step, the window frame is moved to the draining area. Here the level of humidity needs to be as high as possible so that any excess material can run off while it is still wet. This is followed by the drying phase.