Magic Eraser

QUESTION

How permanent are permanent markers?

PURPOSE

The purpose of this investigation is to determine how permanent are permanent markers. This is important to know because if your toddler scribbles on the wall, you need to know how to get it off quickly. Also if people buy permanent markers, they are probably going to want the markers to be permanent.

Hypothesis

We hypothesize that permanent markers are not always permanent. We believe this because our teacher wrote something on her hand using a permanent marker, and it came off in the shower.

PROCEDURE

MATERIALS

Permanent markerTweezers5 plastic containers1,125 mL of water, vinegar, all purpose cleaner, and rubbing alcohol ScissorsTee shirt Tray 20 fabric squares( from Tee shirt) .Pencil

Variables

Manipulated/Independent : solvent. Responding/Dependent : how much permanent marker Is removed .Constant : how much liquid is put into the cups. Size of the square's . The size of permanent marker drawn on the square . Method of rating .

Directions

1.Draw a quarter sized circle on each piece fabric square. Repeat for the remaining 19 pieces.

2. Color in each circle using a permanent marker. 3. Fill one cup with 50 ml of water. Label cup water.4. Fill one cup with 50 ml of vinegar. Label cup vinegar .5. Fill one cup with 50 ml of all purpose cleaner. Label cup all purpose cleaner .6. Fill one cup with 50 ml of rubbing alcohol. Label cup rubbing

alcohol. 7. Place one fabric square in each cup. 8. Let soak for 24 hours.9. Remove fabric from cups.10. Rate the amount of marker left on each fabric square from 0 to 10

with 0 being no stain left and 10 being stain completely removed.11. Repeat steps 2-10 for 4 more trials.

Variables

Manipulated/ Independent : solvent

Responding/Dependent : how much permanent Is removed

Conclusion

Our hypothesis was correct. Permanent markers are not always permanent . The average removal rate for all Purpose Cleaner was 5. The rubbing alcohol removed the most marker with a rate of 7.4 . We think that we should not change the color next time because , some of the colors effected the removal of the permanent marker ink.