Handle weights with care.

2. Before use, remove dust from the surface of the weights with a soft brush or cloth.

3. Check the weight inside the box before and after use to prevent loss.

4. Weights should be stored properly and not placed in a damp and dusty environment.

Do not touch the weights with bare hands. Use a tool to remove the weights when handling them.

6. Prior to calibrating the balance, the weights must be maintained at a constant temperature to achieve the laboratory's temperature conditions.

7. Sets of weights must not be mixed with other weights.

Avoid using thick acids, alkalis, and oils during use.

9. After use, wipe the weights clean with alcohol and allow them to air dry naturally before storing them in the original packaging box for future use.

10. Weights should be calibrated regularly based on usage frequency, and calibration records should be kept.

11. If there's an issue with the weight performance, it should be sent to a testing facility for inspection immediately.