Hi folks,
this is a not (yet) complete collection of GHS warnig symbols (see Wiki. link below). These are all hazard symbols, except for the transportion pictograms. Printed in PLA these signs are cheap (<1€), durable, reusable and chemically resistant.

Fee free to leave me feedback and suggestions and let me see your prints, I'm curious. Also I won't print all of the signs myself, because I don't want to waste material only for a photo or two. But it would be nice if you share your experience. I've printed the "compressed gas" sign as a Demonstrator. The Red color is almost excatly as it should be (my PLA is RAL 3002 compared to the suggested RAL 3001). For the White and black you can take any decent filament I think.

See als my pictogram collections:

Emergency Symbol collection:
https://www.thingiverse.com/thing:4830734

Fire Symbol collection:
https://www.thingiverse.com/thing:4830768

Mandatory Symbol collection:
https://www.thingiverse.com/thing:4832942

Warning Symbol collection:
https://www.thingiverse.com/thing:4834030

File structure:

There are a lot of files, I know, but it's systematic, every sign has 5 files:

.stl - Mesh.3mf - Prusa Sclic3r 2.3 with colorchangesf3d - Fusion360 file.step - For use in other CAD software...170mm.svg - a vectorgraphic file scaled to 170 mm (inkscape)

Print:

The print time is usually <2.5 hours. The signs are meant to be printed in 0.2 mm layerheight. Therefore the white base is 3 layers (0.6 mm) and the black symbols another 3 layers (0.6 mm) and finally the red part is another 3 layers (0.6mm). The sign is always 170 mm in wide and high. The color changes are alreday added in the .3mf files in the order white, black and red.

Also please be careful when removig the sign from the print bed and definitely let the part cool down before removing it. Because the signs only have a base of 3 layers they can be damaged or bend prettey easy when warm.

Material:

Please use PETG or other UV resistant materials if you want to use the signs outdoors. For indoor purposes PLA is fair enough. The cost for each print is < 1€ for regular PLA. The colors should be choosen in a way so they are as close to the RAL colors of the ISO 3684 standard (link below, or image above). Some filament producers release the RAL color in the specs of their materials. I am using "Das-Filament" a lot. Some of their PLA comes really close to the RAL colors suggest for the safety symbols. Take care when choosing the colors.

Design:

I took the .svg files from Wikimedia (link below) scaled them to 170 mm in diameter using inkscape (link below). The rescaled version is then loaded to Fusion360, where the base profile is extruded in negative direction -0.6 mm and the black parts inlcuding are extruded to the positive direction +0.6 mm and the red part further +0.6 on top f the black material. Lastly I added colors to the faces of the sign bodies, every sign is one body. Feel free to change the signs, but if you do please share your files for everyone else.

Links:

Wikipeda Entry GHS Hazard pictograms:
https://en.wikipedia.org/wiki/GHS_hazard_pictograms

Colors for safety signs
https://en.wikipedia.org/wiki/ISO_3864

inkscape
https://inkscape.org/de/

How to change color:
https://www.help.prusa3d.com/en/article/color-change_1687

Red Filament (RAL 5015):
https://www.dasfilament.de/filament-spulen/pla-1-75-mm/132/pla-filament-1-75-mm-kirschrot?c=11

White Filament:
https://www.dasfilament.de/filament-spulen/pla-1-75-mm/349/pla-filament-1-75-mm-tonweiss-matt?c=11

Black Filament:
https://www.dasfilament.de/filament-spulen/pla-1-75-mm/363/pla-filament-1-75-mm-schwarz-matt?c=11
Print Settings