We are using Aspose.Cells for Java 26.6 to convert Excel workbooks to PDF via Workbook.save(path, PdfSaveOptions) . When a worksheet contains cells styled with CellBorderType.DOUBLE on the top and bottom borders and the …...sides of every populated cell, Color.BLACK , no other formatting...LEFT_BORDER, CellBorderType.DOUBLE, Color.getBlack()); style.setBorder(BorderType...