how to check the quality of logo metal plate

Metal plate are one of the most common and important hardware components for luggage and bags. They are not merely ordinary hardware components but also play a significant role in enhancing the aesthetic appeal of the bag. After purchasing a batch of metal plate, how should we inspect their quality?How to check the quality of logo metal plate? Follow us to check:

How to check the quality of logo metal plate? Quantity and Model Inspection

Especially when purchasing metal plate in bulk, it is essential to verify the quantity and model, as this is a basic requirement. Such a basic mistake must never be made. Following this, more detailed inspections should be conducted.

Appearance Inspection

Appearance inspection is a fundamental testing item, typically conducted by visual inspection of the metal nameplate’s surface by inspection personnel, which requires a high level of experience from the inspectors.

Surface Flatness

Check whether the surface of the metal nameplate is flat and free of abnormal dents or defects.

Surface Color

This refers to the surface color, which can be described as a sensory perception. Compare it to the previous standard color to determine if there is a significant deviation.

Logo and Text Clarity

Since it is a logo metal plate, the inspection of the logo section should be particularly important, especially its clarity and recognizability. It should look comfortable and clear.

Dimension Inspection

The dimension inspection of logo plate is also a basic item, but it relies on relevant tools for testing rather than visual observation, thereby compensating for the inaccuracies of human vision.

Specification dimensions

Use measuring tools to measure the dimensions of each part of the logo nameplate to ensure they meet the requirements specified in the specification manual.

Shape precision

In addition to standard specifications, shape dimensional precision is also critical. This may not be measurable with ordinary measuring tapes, requiring the use of more precise measuring instruments and equipment.

Performance Inspection

Conduct a performance inspection.

Adhesion Test

For metal plates with coatings, plating, or film, perform a simple adhesion test. For example, apply adhesive tape to the coated or film surface, quickly peel off the tape, and observe whether the coating or film peels off or flakes; alternatively, gently scrape the coating surface with a fingernail to check if the coating removes easily.

Preliminary Corrosion Resistance Assessment

If the metal plate is intended for outdoor use or environments where it may contact water or chemicals, carry out a simple corrosion resistance test. For instance, place the metal plate in a humid environment for a specified period, or gently wipe the surface with a solution like dilute hydrochloric acid or saltwater, and observe for signs of corrosion, rust, or discoloration. Note that this method only provides a preliminary assessment; professional laboratory analysis is necessary for precise corrosion resistance testing.

How to check the quality of logo metal plate – Process Inspection

Welding Quality

If the metal plate has welded sections, inspect the welds for uniformity, smoothness, and defects such as porosity, slag inclusions, incomplete fusion, or burn-through. Use a magnifying glass or welding inspection tools to carefully examine the weld surface and cross-section.

Edge Treatment

Check whether the metal plate edges have undergone grinding, chamfering, or passivation. Ensure the edges are smooth, free of sharp burrs, and comfortable to the touch to prevent skin scratches or abrasions with other objects during use.

In summary, metal plate are one of the more important components in bag hardware, not only fulfilling the basic functions of hardware but also playing a significant role in the aesthetic appeal of the bag. Therefore, inspections must be conducted rigorously and meticulously.