10018 Cobalt Blue Light

• PB28 ^{●●●●●}

Cobalt Blue (cobalt aluminium oxide) was developed in 1802 by Louis Jacques Thénard, who described it as ‘a blue colour as beautiful as Ultramarine’ (referring to the historical Ultramarine Blue pigment, made with the mineral lapis lazuli, which was highly prized at the time). Unlike the clean transparency of modern Ultramarine Blue, Cobalt Blue has a slightly ‘milky’ quality and it has a moderately low tinting strength.