Aspose word to PDF conversion rendering issue

Aspose.Words Product Family
1

Hi,
I’m having an issue where a picture of a graph in the word document that contains 2 x-axis dotted lines when converted to PDF using the code below renders them as solid lines. But when you zoom into the PDF to a ridiculous percentage, the line appears to be dotted.

string pdfReportPath = dir + @"TestPDF_12022025\PDF_Aspose.pdf";
string wordFile = dir + @"TestPDF_12022025\TextFile_Aspose.docm";
Document oWordDoc = new Document(wordFile);
Aspose.Words.Saving.PdfSaveOptions options = new Aspose.Words.Saving.PdfSaveOptions
{
    SaveFormat = Aspose.Words.SaveFormat.Pdf,
    // Optimize file size and preserve vector image quality
    OptimizeOutput = true,
    ImageCompression = PdfImageCompression.Auto, // Keep EMF as vector
    // Downsampling off to preserve image resolution (especially vector)
    DownsampleOptions = new DownsampleOptions
    {
        DownsampleImages = false // Do not rasterize EMF or downsample images
    },
    // Optional: Embed only used fonts (smaller size)
    EmbedFullFonts = false
};
// Save the document as PDF
oWordDoc.Save(pdfReportPath, options);

Is there a way to fix this?

Here are some screenshots of the axis in context:
AxisInWordFIle.png (30.1 KB)

AxisInPDF.png (52.9 KB)

Here are the files I’ve used for testing:
TestPDF_12022025.zip (111.0 KB)

2

@JThomas98

Based on limited evidence (treat as hypothesis), here is a cautious take:
Summary of what is happening:

  • I could not confirm a documented solution for this scenario yet.

Why it matters:

  • Nothing in the current knowledge base matches this scenario, so proposing specific settings would be guesswork.
  • To avoid misleading guidance, I prefer to pause instead of speculating.

Next steps: please share a minimal repro (HTML/PDF snippet, SDK and version). I’ll check against the latest docs and release notes.

Assumptions / confirmations needed: SDK + version, file types, minimal sample, and exact error/output.