State four qualities of a good eggshell.

1. Thickness: A good eggshell should have a sufficient thickness to protect the egg inside from damage.

2. Smoothness: The surface of the eggshell should be smooth and free from cracks or bumps, which can indicate a weaker shell.

3. Uniform color: A good eggshell should have a consistent color throughout, without any discoloration or spots.

4. Strength: The eggshell should be strong enough to withstand handling and transportation without breaking easily.

1. Smooth and uniform texture
2. Strong and firm
3. Odourless
4. Free from cracks or blemishes