Here’s how you choose the tin box lid and bottom

Tin containers come in a myriad of designs, particularly in the structure of their lids and bottoms. These variations include single-layer and double-layer lids based on the number of layers, flat and arc lids based on the lid surface, and one-time forming bottoms and three-piece body and bottoms based on the bottom forming method, among others.

Generally, tin box lids are categorized into two main structures: the outer-rolled lid and the inner-rolled lid. The choice between these two is not a matter of quality but rather a matter of preference. The distinctions can be visualized through the following images:

1. Outer-rolled lid – This design features a lid where the edge is rolled outward, providing a distinctive look and feel.

2. Inner-rolled lid – In contrast, the inner-rolled lid has its edge rolled inward, offering a different aesthetic and potentially different sealing characteristics.

In addition to lid variations, there are three common bottom structures found in everyday tin containers:

1. Buttoned bottom – This type of bottom lacks a step and features an inner-rolled edge. While it may not provide the best sealing effect, it has a unique appearance.

2. Covered bottom – With a step in the bottom, this structure allows for a better seal compared to the buttoned bottom, enhancing the container's functionality.

3. One-time forming bottom – This innovative structure forms the tin body and bottom in a single process. There are no visible edges or steps in the bottom, which is often used in small tin boxes. However, the height of the box is limited due to this design.

Each of these structures serves different purposes and preferences, whether it's for aesthetic appeal, sealing effectiveness, or production efficiency. The choice of lid and bottom structure ultimately depends on the intended use and the desired appearance of the tin container.