Engineer's blue
Esquema
Jerarquía
<materials by function> > colorant (material) > pigment > <pigment by color> > blue pigment > synthetic organic blue pigment > Prussian blue (pigment)
Descripción
An oily film of Prussian blue pigment formerly used in machine making; it was placed on machine fittings, then the parts were rubbed together; the removal of the pigment indicated the position of high spots or rubbing between the two surfaces.
URI original del concepto
Otros términos
- blue, engineer's [en]