Be cautious when handling the weights.

2. Before use, clean the scale surface of the weights with a soft brush or cloth.

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

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

5. Do not touch the weights with bare hands. When using the weights, remove them using a tool.

6. Before calibration, the weights must be maintained at a constant temperature to reach the laboratory's temperature conditions.

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

8. Avoid using thick acids, bases, and oils during use.

9. After use, clean the weights with alcohol and let them 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.