Okay, so imagine there's a type of candy called "tempered candy." It's hard and shiny and doesn't melt in your hands like other candies do.
Now, imagine you have a drawing of a piece of tempered candy. You want to show it to your friends, but you can't just give them the drawing because they won't be able to see what it really looks like.
So you decide to make a sculpture out of real tempered candy that looks just like your drawing. This is called a "tempered representation" of the candy.
In real life, a tempered representation might be a painting or sculpture that looks just like a real object, like a vase or a person's face. The goal is to make it so accurate that someone who's never seen the real thing would be able to recognize it just by looking at the representation.