Basic crafts to process color-changing mugs: 1. Direct printing; 2. Water transfer printing; 3. Heat transfer printing.

1. Direct printing: it refers to use rolling printing machines to print on the cups directly. The technique is a bit hard. The ordinary factories can only print three colors on the cups, once they meet the patterns with multiple colors, they can’t handle it. However, some factories with strength can print up to 20 colors on the cup withour deviation. This technique is only suitable for small batch production, low efficiency, and it can only print color blocks, it is hard to print photos.

2. Water transfer printing: it means that machine prints on the water transfer printing paper first, which can print rich colors and achieve mass production. But this technique has a high demand on circumstances: constant temperature and humidity, and this can guarantee the printing accuracy. Then put the water printing paper in the water, the pattern will split from paper, next put the pattern on the cups, finally bake the finished product.

3. Heat transfer printing: similar to the procedures of water transfer printing. Paste the printed heat transfer printing paper on the cups by machine heating and pressure. When producing color-changing cups by water transfer printing, the seperation between pattern and paper fully relys on manual operation, while it relys on machine automatic processing during heat transfer printing. Thus a modern color-changing factory possesses pigment production line, automatic printing production line and automatic heat transfer printing production line, which reflects the strongest competitive strength.