I’m working on a Project that Prominently Features a Red PETG Top Surface that after the Printing is done gets Sanded with Grits from 400-2000 +Heat Treatment.

There is a Big Issue tho, After the Sanding is done, I can Rather Prominently see the Walls and Infill of the Layers Below. At first I suspected that I just sanded too much and that the internals weren’t really filled in 100% as they should, but after some testing and Closer Inspection, it just seems the Red PETG is just Transparent enough that I can see the layer below…

So how do I stop this from Happening? Thus Far I played around with Fan Speeds, Nozzle Temps (±10°C), Layer Hight and Ironing all Solid Layers with Mixed Success, non Satisfactory enough however…

  • LastYearsIrritant@sopuli.xyzEnglish
    4·
    6 days ago

    I would try adding more top layer shells. That way there’s more plastic between the surface and the first infill layers.

      • LastYearsIrritant@sopuli.xyzEnglish
        6·
        6 days ago

        Infill is different from top layer shells. The infill is a different pattern from the top and bottom layers, and a different pattern from the walls.

        Usually the top/bottom shells are set to 5 by default, and the walls are 2. If you bump the top and bottom layers to something like 10 or 15, they’ll be much thicker before it switches to the infill pattern.

        • Mr.Mofu@lemmy.blahaj.zoneOPEnglish
          2·
          6 days ago

          So No matter what I try, It only does Infill before 1 Layer of Top Surface. No settings seem to trigger anything else. Even putting infill at 0% makes it just hollow instead of producing more Top Surface Layers…

          • papalonian@lemmy.worldEnglish
            3·
            6 days ago

            It isn’t an “infill” setting. It’s “top/bottom” settings. I don’t what slicer you’re using, but every slicer should give you the option to set the number of top layers and bottom layers.

            • Mr.Mofu@lemmy.blahaj.zoneOPEnglish
              1·
              5 days ago

              Yes, top layer is set to 5 layers yet it only does 1 Top Layer since thats the surface. Rest is handled as Infill.

              I tried everything from 1-100 Top Layers, nothing changes. Insides still get printed as Regular Infill.

              • papalonian@lemmy.worldEnglish
                2·
                5 days ago

                Can you please upload some screenshots of the model you’re printing in the slicer, and the related settings? That’s really odd behavior.