A lithophane (or lithopane or French: lithophanie) is an etched or moulded artwork in thin very translucent porcelain that can only be seen clearly when back lit with a light source. It is a design or scene in intaglio that appears "en grisaille" (in gray) tones
One of my friends at my hackerspace in Northampton, Eng-a-land, called NortHACKton (http://northackton.stdin.co.uk/blog/) is attempting to make himself a CNC so that he can carve one of these. It was while we were discussing this and how to go about making one that came up with this variation of the idea, so this instructable is dedicate to Max and I hope that his efforts to produce his own lithophane go equally as well.
Right with all of that background out the way what follows is a guide to making your own paper lithophane. I hope you'll be pleasantly surprised by how simple it is to achieve such effective results.
Step 1: Creating an Image
- First you'll need an image of something you want to turn into a lithophane.
- Convert the image to a grey scale version of itself
- Then reduce the number of colours within the image to the number of layers you want your lithophane to have.
- Separate each colour into it's own layer and print them all out individually.
- Cut those images out and stick them all together and voilà you'll have a paper lithophane.
Step 2: Using My Progam
When the program is running, click the 'Load Image' button to select your desired image. It will be loaded and automatically split into 2 layers with initial values. The dropdown box in the middle allows you to switch between each layer, view the whole thresholded image or original image in greyscale.
Each blue box within the scale on the right represents the threshold value for a layer. These can be dragged left or right to change the value. It's a bit of a hack but it's functional. Layers can be added or removed by right clicking this area.
When you're happy with the layers then click the save layers button, this will produce one bitmap per layer with the same size as the original image. Load them up in your favourite program to print them with the desired size.
Step 3: Creating the Lithophane
Start by taking a plain rectangle of paper the same size as the other images.
Some of the layers will have more paper removed than others, glue the layers to the base rectangle starting with the one with the least paper removed.
Once all the layers are added to the lithophane then place another solid rectangle of paper of the top to hide all the cut out regions.
Your lithophane is now complete, from the outside it should look like a plain square of paper but once you hold it up to the light the insides become visible.
I mostly started with some easy pumpkin carving images, but much more complicated designs can also be made