Question

Correct order adopted for making sculptures through lost wax process-
(A) Application of the facing
(B) Modelling the wax form over the core
(C) Preparation of the core
(D) Melting and pouring the metals
(E) Application of the negative mold investment material
Choose the correct answer from the options given below:

• A. (C), (B), (A), (E), (D)
• B. (B), (A), (C), (E), (D)
• C. (A), (C), (E), (B), (D)
• D. (D), (B), (C), (A), (E)

Hint:

Think of lost-wax casting as building from the inside out: Core → Wax model → Investment Mold. Then, the wax is replaced by metal.

Answer 1

The Correct Option is A

Step 1: Logically sequence the steps of the lost-wax casting process (cire-perdue).

(C) Preparation of the core: First, a heat-resistant inner core (often clay-based) is made, roughly in the shape of the final sculpture.
(B) Modelling the wax form over the core: Next, a layer of wax is applied over the core and is sculpted into the final desired form of the sculpture.
(A) Application of the facing: A fine layer of investment material (facing) is applied to the wax model to capture all the fine details.
(E) Application of the negative mold investment material: The entire model is then covered in a thicker, coarser investment material to create the main mold. Sprues and vents are added.
(D) Melting and pouring the metals: The mold is heated to melt and drain out the wax (lost wax), and then molten metal is poured into the cavity left by the wax.

Step 2: Match the logical sequence to the given options. The correct order is (C), (B), (A), (E), (D). This matches option (1).