The phrase "contrasting materials" refers to two or more different types of materials that are placed together in a way that highlights their differences.
Sentences with «contrasting materials»
The mix of contrasting materials makes this a striking piece which is hard wearing and easy on the eye. (sweetpeaandwillow.com)
This is a close up of a urinary bladder with contrast material inside. (marvistavet.com)
Here metal does lie behind — but as contrasting materials and color, not support. (haberarts.com)