Utopian Vizor

A Utopian vizor, breather and coat, from Terra Ignota


placeholder figcaption

I wanted a costume mask that incorporated some form of air filtration, and, well, things grew from there.

The coat is a retroreflective jacket from China via Amazon. The vizor is a full-face sunglasses model from China via Amazon.

The core of this mask is a 3M 6200-series Half Facepiece Reusable Respirator, with a pair of 3M 60926 filter cartridges. To that, I’ve added 3d-printed covers for the filters, and a 3d-printed outflow filter in a style inspired by a Bionicle mask.

3d Modeling

I did not create these models from scratch.

The model that gets printed from the 3d printer comes from a gcode file, which describes where to move the print head and how much plastic to extrude. The gcode file is made by a slicer program, which creates the gcode file’s printhead paths by analyzing the shapes encoded in STL files. STL files describe a 3d model in the form of points connected by edges. (some 3d modeling software creates .obj files instead of .stl; .obj is a different but similar format.) A cube has eight points and 12 edges. What would happen to the cube if you moved a point so close to another that they occupied the same space, and merged together? This is how I made my custom models: by opening the .stl files and rearranging their points.

The source files I used were the following:

The mask in total can be conceived of as two subassemblies: the filter covers, and the outflow filter.

The two filter covers are mirrored copies of one file, which was directly iterated on from the original source filter cover model. Here you can see the progression of changes to the left-hand filter cover, from the original model (left, painted copper) to the final model (right, painted blue):

placeholder figcaption

The outflow filter was a more-complex assembly, being made of two pieces of plastic:

Sanding and smoothing the prints

Painting the parts

After the copper paintjob, I wanted something darker and bluer, to match the vizor. I ended up using several coats of black gloss primer, a double coat of automotive glitter paint, and then two coats of clear gloss.

Further treatments