Step 1 — Ensure the plaster spatula is clean, dry, and free from any residual material before use.

Step 2 — Measure the required quantity of dental plaster or stone powder and place it into a clean rubber mixing bowl.

Step 3 — Add the recommended amount of water or liquid into the bowl as per the material manufacturer's powder-to-liquid ratio instructions.

Step 4 — Hold the spatula firmly by the plastic handle and insert the broad blade into the mixing bowl.

Step 5 — Begin mixing by pressing the flat blade against the sides and bottom of the bowl using broad, sweeping strokes to incorporate the powder into the liquid.

Step 6 — Continue mixing using circular and figure-eight motions to eliminate lumps and air pockets, ensuring a smooth and uniform consistency.

Step 7 — Mix for the recommended duration as specified by the material manufacturer — typically 60 seconds for plaster and stone.

Step 8 — Check the mix for the correct creamy, lump-free consistency before using it for model pouring, impression boxing, or any other procedure.

Step 9 — Use the mixed material immediately as dental plaster and stone begin to set quickly after mixing.

Step 10 — After use, clean the spatula immediately under running water to remove all residual material before it hardens.

Step 11 — Disinfect or autoclave the spatula as per the clinic's or lab's infection control protocol before storing or reusing.