What staining technique results in an intense reddish-orange pigment for calcium salts?

The staining technique that results in an intense reddish-orange pigment for calcium salts is the calcium-dye lake reaction. This technique specifically targets calcium deposits in tissue specimens, allowing for visual identification. In this reaction, calcium ions react with specific dyes, forming a vivid complex that highlights the presence of calcium in histological samples. The intense reddish-orange color produced is particularly useful in histopathology for diagnosing conditions related to abnormal calcium deposits, such as calcifications in various tissues.

The other options focus on different staining techniques that do not yield the reddish-orange coloration specific to calcium salts. For instance, Modified Fouchet's technique is typically used for detecting bilirubin rather than calcium. Gomori's Aldehyde is more associated with demonstrating tissue elements like glycoproteins and polysaccharides. Turnbull's blue technique is utilized for identifying ferric iron in tissues, leading to a blue pigment rather than the reddish-orange indicative of calcium.