Continued from Part 1.
So the verdict is in.
(Click for full size)
Polypropylene works the best.
It looks like the ghosting correlated pretty well with the water absorption numbers I listed last post. Also, its interesting to note that the low odor markers cleaned up much better than the bold markers did on the two clear plastics.
5 days later, this is how it cleaned up without any spray or cleaner:
Now, because the polypropylene was translucent, I was concerned that I wouldn’t be able to put a background behind it. However, since the polypropylene was thin enough, it turned out alright:
I’ll probably vary the color of the gridlines for the background to see which one works the best, but even 100% wasn’t too bad. In the picture, the squares are 1 inch x 1 inch and the line thickness is 3 points.
Next step will be ordering the full size sheet of the polypropylene (hopefully they’ll be able to ship it with some protective plastic covering), getting a background printed up (probably from Kinkos) and mount it to a backing board (I’m thinking MDF right now, but I might come up with something else.
Update: The project is continued here.