I've been in need of a lampshade for a while and now I've finally decided to make one. Whilst searching for suitable materials I came across some old Playstation game cases and here is the rest ;)

Tools & Materials:

6 DVD cases
transparent plastic bag

temperature adjustable soldering iron (something like this)
hobby knife + blades No18 and No11
scissors
ruler
hot knife (something like this)
modeling jigsaw
sharpies

template.pdf
Download

Step 1: Preparing the Cases

First of all I removed the transparent plastics from each of the cases and saved them for later. Then I separated the two halves with a hobby knife and cut away the top and the bottom edges with scissors.

Step 2: Cutting

Next I needed to cut the plastic cases into 1cm strips, to do this I marked the top(s) and the bottom(s) of the cases and scored lines with a hobby knife.

At first I thought it would be quite easy to cut through the plastic cases with a hot knife, but it proved to be quite a lengthy process so I resulted in using a modelling jigsaw which turned out to be much quicker. After this I ended up with 60 1cm strips.

Step 3: Cleaning the Strips

For cleaning the edges of the strips I used a hobby knife with blade No18 followed by scraping with No11.

Step 4: Preparing for Welding

In order to weld the structure together I needed a filament, so I cut up the reminder of the cases with scissors.

Once I done that I printed myself a template and started cutting off the edges for triangles with a hot knife.

Step 5: Welding the Triangles

Before I started the welding process I aligned three pieces onto the template to form a triangle. Next I slid the tip of the soldering iron set at 300°C over all of the joints from both sides. To strengthen the joints I melted the filament into the grooves made by the soldering iron.

Step 6: Coloring

In order to add some color to the lamp shade I placed the transparent plastic film from the cases over the triangle and ran the hot knife along the edges whilst pressing down with a card. I needed to to this for 18 out of 20 triangles, however I only had enough transparent plastic film for 12 triangles so for the remaining 6 I used a transparent bag.

Next I used sharpies in different colors to stain the triangles.

Step 7: The Top Triangle

For the top of the lamp shade I cut out a circle from the back side of a case and cut it furthermore to fit into the triangle, not forgetting about the hole for the lamp fitting. Next I welded the two pieces together adding filament as I went.

In order to achieve the 138.19° angle of the icosahedron I stuck the template to the desk and added a piece of wood positioned so that when two triangles meet they would have the correct angle.

Step 8: Welding

To make the welding process easier I melted the filament in 5 places along the joint whilst pushing two triangles together. This made adding the filament over the joint very easy. Then I just carried on adding the triangles to form the top and the bottom half of the icosahedron.

Step 9: Joining the Halves

Before joining the halves I slid the soldering iron tip over all of the joints on the outside to make them stronger. To finish off I placed the top part onto the bottom and welded them together adding filament wherever needed.

Step 10: Final Thoughts

The project took about 10 hours to finish, which was a little longer than I predicted, but it was worth it. I really like how it turned out and I love the effect it creates on the walls.