In this project we will look at different ways to achieve the "Appearing Marauders’ Map" effect. There are a number of ways to do this but I like to keep it as simple as possible so I did it in these three ways.
I got the info on what would work as inks and how to reveal them from this site
1. "The Potions Reveal" Personally I have found this to be one of the easiest ways of doing the marauders’ map because all you need to do is draw a map on paper in a half baking soda half water mix and then pour "Revealo Potion" over it (Grape Juice)
2. "Wand Reveal" This has got to be one of my favorite ways of doing this because the effect is the closest to that in the books and movies. Essentially what you do is get a basic invisible ink set (I got mine on Ebay) and make sure it is one of those that has a light to show the ink, and then draw the map with the pen included in the set and wire up the light from the set into either a homemade wand (I usually use the paper wand method when doing this to make running the wires up the wand easier) or any other hollow wand you might have. You may also be able to do this method using some tonic water and a black light if you can find one small enough to fit in your wand or can incorporate the larger light somehow into the harry potter theme.
3. "Heat Reveal" This method is very similar to the wand reveal method but it is a little bit cheaper if you happen to have the right materials laying around. Essentially the idea is that you are going to use heat instead of light to reveal the marauders’ map. I have not actually tried this method yet but in theory I would find a small but powerful light bulb that was small enough to fit in the tip of my wand and wire it up though my wand then draw with vinegar a basic marauders’ map and reveal it. Personally I have not done this yet due mostly to lack of time but also because this is not really the best method because I imagine that if you are using heat to reveal the marauders’ map it will be burning the fibers in the paper which would mean that it would stay revealed. Good for secret notes and perhaps other magical means but not the best for this particular purpose.
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