cobalt ultramarine

Thân thiện

The artist mixes cobalt ultramarine pigment into a small pool of linseed oil on her palette.

Definition

Noun: - A greenish-blue pigment composed primarily of cobalt oxide and alumina. It is a synthetic inorganic pigment known for its color stability and use in artistic and industrial applications.

Usage

• This term specifically refers to the chemical compound used as a colorant. It is a technical term most common in fields like art conservation, chemistry, and industrial manufacturing.
• Example: The artist's palette included cobalt ultramarine for the serene sky tones.
• Example: The chemical analysis confirmed the presence of cobalt ultramarine in the historical paint sample.

Advanced Usage

• In technical contexts, it may be specified by its chemical formula or Color Index (CI) number to distinguish it from other cobalt-based blues like cobalt blue (cobalt aluminate) or cerulean blue (cobalt stannate).

Variants and Related Words

• Cobalt Blue: A different, brighter blue pigment (cobalt aluminate). While both contain cobalt, they are distinct compounds with different chemical compositions and hues.
• Ultramarine: Traditionally a deep blue pigment made from lapis lazuli, or its modern synthetic version (sodium aluminosilicate). "Cobalt ultramarine" is a separate, greenish-blue pigment that shares part of the name due to its blue color but not its chemical makeup.

Synonyms

• Pigment Green 50 (A common industrial/Color Index name).
• Cobalt Greenish-Blue.

Notes on Different Meanings

• This term has a single, specific meaning as defined above. It is not used idiomatically or in phrasal verbs. Confusion sometimes arises with the more common pigments "cobalt blue" and "ultramarine blue," but "cobalt ultramarine" is a distinct material.

Học thuật

Noun

1. greenish-blue pigment consisting essentially of cobalt oxide and alumina

Từ đồng nghĩa

• cobalt blue