A composition of red ochre: that’s a mineral, Creighton. It comes from places like this:
What does one get if one doesn’t thoroughly grind and sift this grainy mineral pigment? Here’s what one four-year-old discovered:
The granules, we note, are preponderantly in the body of the paint strokes and the same colour as the paint.
What we are seeing here is a pigment which has not been prepared to the highest standards, consistent with it having been intended for a purely ephemeral use. Consider also the implications for the likelihood of an organic binder having been added.
Post Edited (10-Nov-14 18:12)