Place a finger over the top of the straw to make a seal. When you remove the straw from the ... with isopropyl alcohol (rubbing alcohol) to see if the inks separate. So, is black a color? Each of the ...

An introduction to the four main colours of ink required to print a magazine. The class can discuss ratio in a real setting. There is also an opportunity to discuss capacity and cost. Possible ...

An introduction to the four main colours of ink required to print a magazine. The class can discuss ratio in a real setting. There is also an opportunity to discuss capacity and cost. Possible ...