simple laser cut mask
thingiverse
The DressCode workshop provides a pattern for creating a felt accessory; the example utilizes synthetic felt and requires laser cutting with specific settings (15W power, 80 speed, 0 focus, 500 frequency). After cutting, make two half cuts on the back side (5cm from center edge) and one on the front side at the slit's center. This facilitates folding. Attach a triangle piece in the gap to maintain nose angle, sewing it in place for stability. Extra stitching on top can support the nosepiece. Refer to pictures for guidance. (Source: http://www.kobakant.at/DIY/?p=4156)
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