Published 05/27/2021 at 276 × 350 in Strength of Salt Core Composed of Alkali Carbonate and Alkali Chloride Mixtures Made by Casting Technique* Fig. 3 Photographs of specimens at ambient temperature. (a) KCl–30 mol%NaCl. (b) K2CO3–50 mol% Na2CO3. Fig. 3 Photographs of specimens at ambient temperature. (a) KCl–30 mol%NaCl. (b) K2CO3–50 mol% Na2CO3.