Handle weights with care.

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

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.

Do not handle the weights by hand. Use tools to remove the weights when in use.

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

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

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 their original packaging box for future use.

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

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