Hello and welcome to my first Instructable, please don't complain about my English (just pm me I will fix it).
I'm going to teach you how to scratch-draw a calculator or something else. Things like your cellphone (I wouldn't do that), your psp (I wouldn't do that) or your Xbox 360 (no I neither would do that)
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Step 1: Materials
ok, let's get started. The materials and tools.
Al these materials and tools are household products, maybe you don't have them but there not hard to get (unless you live in Canada).
The tools and materials you need are:
a lot of tape
image of something you want to make
a little knife
something to scratch in
gloves might be useful since your working with a knife, even when your not afraid of cutting yourself (jackass!), you have to put a lot of pressure on the back of the knife, this can hurt when you have a complicated image.
Step 2: Taping the Image
take your image and tape it on the surface, now you can start scrathing the image, make sure you add tape when it gets loose.
Step 3: Filling Up the Scratches
simply use tip-ex to fill up the scratches. wait till its dry and scrape off the unnesecary tip-ex