•Are permanent markers
really permanent?
The purpose of my investigation is to determine if permanent
markers really permanent? This is important to know because, if
you are buying a permanent marker you would want to know if
they the marker is really worth the money!
I Hypothesize that the
sharpie won’t be as
permanent as you think
it would be. I believe this
because the sharpie can
come off the walls with
special cleaners.
Detergent
Scissors
15 5 CM X 5 CM FABBRIC SQARS
1 Sharpie MARKER (A)
2 Caliber MARKER (B)
3 Office Depot MARKER (C)
Manipulated variables: brand of markers
Responding variable: percentage of ink left on fabric
Constant variable: size of fabric, how much ink is used on each square , method of
washing and drying , amount of detergent is the same, method of rating
1.
2.
3.
4.
5.
6.
Gather materials.
Cut 15 5cmx5cm fabric squares.
Draw a letter A on one fabric square using brand A marker.
Draw a letter B on one fabric square using brand B marker.
Draw a letter C on one fabric square using brand C marker.
Place fabric squares A,B, and C in the washing machine. Add
detergent and wash. Place in dryer to dry.
7. Using the rating scale 1to 5, rate each square for the amount of
ink still remaining with 1 being nothing remaining and 5 being all
ink remaining. Record score for each square.
8. Repeat steps 3-7 for four more trials.
9. Calculate the average score for each brand of marker.
INK REMOVAL RATE
DETERGENT
TRIAL
1
TRIAL
2
TRIAL
3
TRIAL
4
TRIAL
5
AVERAGE
A
5
4
4
4
5
4.4
3
4
2
2
3
2.8
2
2
3
4
3
2.8
B
C
My hypothesis was correct. Permanent
markers are not fully permanent. The
Sharpie left an average of 4.4 marker on the
fabric on the rating scale of 1 to 5 with 1
being no marker remaining and 5 being all
ink remaining. Caliber brand marker left an
average of 2.8 marker remaining. Office
Depot brand left an average of 2.8 marker
remaining.