The time required to make a large copper seal may vary due to multiple factors.

If calculated from the beginning of design, the design phase may take several days to weeks. This depends on the designer‘s creative inspiration, understanding of the theme, and communication feedback with the client. Complex themes and high demand designs may take longer to refine.

In the stage of carving molds, it may take about a week to carve the original mold, and several days to remake the working mold.

The casting stage is relatively fast and can usually be completed within a few days, but if there are problems that require adjustments, the time may be extended.

During the processing stage, it usually takes several days for tasks such as polishing, coloring, etc. Quality inspection also requires a certain amount of time to ensure that the large copper seal meets the standards.

Overall, making a large copper seal may take two to four weeks or even longer. If special circumstances arise, such as design modifications, process difficulties, etc., the production time will be further extended.