How to print words on stainless steel cups

Printing characters on a stainless steel water cup, soaking one end of a cotton swab in salt water to prepare a fully charged large battery, connecting the positive wire with the positive electrode of the battery, connecting the other end of the positive wire with the water cup, connecting the negative wire with the negative electrode of the battery, and connecting the other end of the negative wire with the cotton swab head soaked in salt water; The specific operation steps of printing characters on stainless steel water cups are as follows:

1. Soak one end of the cotton swab in salt water. As shown in the figure below:

2. Prepare a fully charged battery. As shown in the figure below:

3. Connect the positive lead to the positive electrode of the battery. As shown in the figure below:

4. Connect the other end of the positive lead to the water cup. As shown in the figure below:

5. Connect the negative lead to the negative electrode of the battery. As shown in the figure below:

6. Connect the other end of the negative wire with a cotton swab dipped in salt water. As shown in the figure below:

7. Stick the adhesive tape with hollow pattern on the water cup. As shown in the figure below:

8. Pull out the cotton swab head connected with the negative wire from the hollow part of the adhesive tape. As shown in the figure below:

9. Draw all the hollowed-out places. As shown in the figure below:

10. Tear off the adhesive tape from the water cup. As shown in the figure below:

1 1. The pattern hollowed out on the tape is printed on the water cup, and the operation is completed. As shown in the figure below: