A Material is what an item is made of, for example Platinum.

It might be required for you to import the package if you encounter any issues, so better be safe than sorry and add the import.
import mods.contenttweaker.Material;

You can either retrieve an existing Material using the MaterialSystem or create an entirely new one using the Material Builder

You can retrieve the following information from a Material:

ZenMethod	Возвращаемый тип	Описание
ZenMethod getName()	Возвращаемый тип string	Описание Returns the Material's name
ZenMethod getColor()	Возвращаемый тип int	Описание Returns the Material's color
ZenMethod isHasEffect()	Возвращаемый тип boolean	Описание Returns if the material has the glowing effect
ZenMethod getUnlocalizedName()	Возвращаемый тип string	Описание Returns the Material's unlocalized name

You can either register parts using the part object or it's name string.
You can also either register a single part or multiple at once.
So you got 4 options in total:

ZenScript
 Copy
registerParts(String[] partNames);
registerParts(IPart[] parts);


registerPart(String partName);
registerPart(IPart part);

The registerPart Methods return a single MaterialPart object.
The registerParts Methods return a MaterialPart list.