Cobalt Glass Plates - 4 inch X 4 inch - Pack of 6 Item number CGP4X4. Regularly stocked item. Usually ships within 3 to 5 business days.
grades 8 to 12
ages 13 to 18
list price $94.09 our price $47.05 savings $47.05 (50%)
High-quality dark blue cobalt glass filter is used in sodium and potassium salt flame tests. When a flame is viewed through this filter, the color orange is blocked so that a violet-colored flame is visible. 4" x 4" glass plates sold in packs of 6.