Nickel Ni 28

This lesson focuses on the use of nickel in modern pigments, particularly Nickel Titanium Yellow and Nickel Azo Yellow.

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Objectives

• Understand the historical emergence and application of nickel-based pigments.
• Explore the chemical composition and characteristics of Nickel Titanium Yellow and Nickel Azo Yellow.

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Materials

• Pure nickel sample (metal cube).
• Pigment samples from Pigments Checker, Modern Art: Nickel Titanium Yellow and Nickel Azo Yellow.
• XRF spectroscopy equipment with routine and LK filter sets.

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Lesson Plan

1. Introduction to Nickel in Pigments
   • Discuss the intentional use of nickel in pigments starting in 1954.
   • Introduce Nickel Titanium Yellow as a replacement for Naples Yellow and Nickel Azo Yellow as a substitute for Indian Yellow.
2. Chemical Composition and Properties
   • Describe the composition of Nickel Titanium Yellow, emphasizing the presence of nickel, titanium, and antimony, and its impact on XRF signal intensity.
   • Explain Nickel Azo Yellow’s composition, highlighting nickel as the primary heavy element responsible for its stronger XRF signal.
3. Case Studies
   • Use the Pigments Checker to analyze samples of Nickel Titanium Yellow and Nickel Azo Yellow.
   • Compare the spectra, focusing on variations in peak intensity due to differences in composition.