They are a much better heat conductor than an equivalent cross-section of solid copper.

The dome atop the courthouse is of solid copper.

Cladding enables structures to be made with much less weight than solid copper.

Except that we have nothing with which to damage solid copper.

In a multi-layer board one entire layer may be mostly solid copper to act as a ground plane for shielding and power return.

Her eyes seemed at first to be solid copper, but as she descended the step, Alexia saw they had white dots in the center.

They look equally valuable to me, though perhaps the rod, being solid copper, is worth more.

The center conductor may consist of solid copper, or copper-plated aluminum.

The cables can be solid copper or made of thin strands.

Heating might cause gas bubbles between solid copper pour and certain substrates.