There are obvious differences between black and blue Morton salt in production technology and particle size.

1. Production technology: Morton salt black is made by natural seawater evaporation and post-treatment. Blue is mined from underground salt mines.

2. Particle size: Morton salt has large black particles and has not been processed too much. Blue particles are small and are the product of fine processing.

3. Sodium content: Blue cans reduce the sodium content.

Generally speaking, Morton salt black and blue have obvious differences in production technology, particle size and sodium content.