Engineer's blue
Esquema
Jerarquía
<materiales por función> > colorante > pigmento > <pigmentos por color> > pigmento azul > pigmento azul orgánico sintético > azul de Prusia
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]