Speaking of gold plate, I have a question about two gold-plated
pieces of kitchenware which I found in my travels.
One is a bowl, said to be 22 carat gold plated according to the
label. The other is a gold plated cup said to be 24 carat gold. The
22 carat plating is a dull yellow which seems to be what pure gold is
but the 24 carat is a darker, almost reddish yellow.
Does anybody have an idea as to what causes the difference?