Ch. 122Glassmaking (Part 1)
Richard visited the Emerald Kingdom’s glass factory and produced cobalt blue glass for the Flame Color Experiment. After finding that the first sample had a green tint from impurities, he added manganese to correct it and awaited the results of a second batch.
- Gelo used his status as prince to bring Richard into the guarded glass factory, where director Vichys provided access to a furnace.
- Richard combined cobalt ore, ruby, and phosphoric acid to make cobalt blue pigment, then had Vichys use it to produce a glass sample.
- Richard noticed the sample had a pale green tint caused by impurities in the glassmaking materials.
- Richard gave Vichys manganese powder and instructions for making another cobalt blue glass sheet to remove the green tint.
- Vichys returned with the second sample, visibly trembling with excitement.