Method 1: Crafting Table
Place 3 Any item such as Purpur Block in a Crafting Table to make 6 Purpur Slabs.
6 How to Make a Purpur Slab in Minecraft
Use this simple recipe to make a Purpur Slab in Minecraft. You can see the exact ingredients, recipe layout, and workstation below.
Purpur Slab recipe
Follow the recipe below. The pattern must use the correct slots when the recipe is shaped.
6 
Method 2: Stonecutter
Use 1 Purpur Block in a Stonecutter to make 2 Purpur Slabs.
2 About this Minecraft recipe
This page shows the vanilla recipe for Purpur Slab. It includes the exact ingredients, recipe layout, required workstation, and amount produced.
The data comes from Minecraft Java 26.2. Recipes can change in later game versions, so check the version you play before crafting.