Here is the display that I have put up in my classroom. I find it a lot easier to explain the 2 layer printing process, when there are examples to point at. More often than not, it’s me who gets confused when explaining it in words, and the students are totally getting it!
I made lots of colour variations when I was making this example. It’s a good idea to make 3 or 4 prints of your first colour so that you can make multiple prints – should anything go wrong or if you want to experiment with different colour combinations. The other thing I should have said is that you should be sure to register the print on the paper by drawing a pencil line around the polyboard, this is so that the students get perfect alignment when they do the 2nd print.