kubuntu 18.04 / Gimp 2.10.20 (appimage) / Inkscape 0.92.3 (appimage)
Small image 225 x 225 pix black and transparent exported to a png
The file viewer is liable to introduce its own anti-aliasing for screen rendering.
Inkscape is the problem. There are various modes for importing a png. Do not use 'None (Auto)' use 'Blocky' As far as I can see that will also scale. If the purpose is for scaling, then Gimp will scale this type of image without anti-aliasing. Use Interpolation = None.
Small image 225 x 225 pix black and transparent exported to a png
The file viewer is liable to introduce its own anti-aliasing for screen rendering.
Inkscape is the problem. There are various modes for importing a png. Do not use 'None (Auto)' use 'Blocky' As far as I can see that will also scale. If the purpose is for scaling, then Gimp will scale this type of image without anti-aliasing. Use Interpolation = None.