Smart Paper Regular Paper. Compare and contrast the ‘smart paper” with regular paper. Careful observations are key. . Smart Paper. When you iron the paper? Can you explain why this is happening? . Observe what happens.
What if we tried to……[????] with the paper.
Think! We are going to have to be creative if we are going to figure out how this paper works.What else works?
Remember to follow all safety procedures .Let’s experiment
Why is heat important in the formation of color in smart paper?
List two different ways you can cause color to form.
What would happen if the two invisible-ink reactants were frozen? Would color form?
Would color form after you allow the invisible-ink reactants to thaw?
Is the ink in the pulp of the paper or is it a coating?
What is coated on smart paper?Investigation questions
Today they are used in many, lightweight devices such as adding machines, cash registers, and credit card terminals.
Solid, colorless dyes reacts with a solid acidic compound when they are melted by heat.Background Info