Blurry barcode lines when rotating with Graphis.Rotatetransform

I am generating some labels, with various barcodes. The structure is assembled from some controls previously located in a form.

   psettings.PrinterName = MapPrinters.Printers.GetPrinter(this.form.printer.PrinterSettings.PrinterName);
        pd.PrinterSettings.PrinterName = psettings.PrinterName;
        pd.PrinterSettings.DefaultPageSettings.Landscape = true;

        pd.PrintPage += new PrintPageEventHandler((object o, PrintPageEventArgs e) =>
        {
            for (int i = pageCount; i < data.Rows.Count; i++)
            {
                //e.Graphics.TranslateTransform(panel.Width/2,panel.Height/2,System.Drawing.Drawing2D.MatrixOrder.Append);
                //Impresió en vertical
                if (((CheckBox)Controls["chkPrint"]).Checked)
                {
                    e.Graphics.RotateTransform(90,System.Drawing.Drawing2D.MatrixOrder.Append);
                    e.Graphics.TranslateTransform(291, 5, System.Drawing.Drawing2D.MatrixOrder.Append);
                }
                PrintLines(form, e);
                lData.ForEach((x =>
                {
                    e.Graphics.DrawString(GetCellData(x.Text, data.Rows[i], x), x.Font, Brushes.Black, ObtainRectangle(x,0,0,offsetY), Alineament(x));
                }));
                lLabel.ForEach((x =>
                {
                    e.Graphics.DrawString(x.Text, x.Font, Brushes.Black, ObtainRectangle(x, 0, 0, offsetY), Alineament(x));
                }));
                lBarCode.ForEach((x =>
                {
                    if (GenerateBarcode(x.Text, data.Rows[i], x) != null)
                        e.Graphics.DrawImage(GenerateBarcode(x.Text, data.Rows[i], x), ObtainRectangle(x, 5, 10,offsetY));
                }));
                if (panel != null)
                    e.Graphics.DrawRectangle(new Pen(Color.Black, 1), new Rectangle(panel.Location.X, panel.Location.Y -offsetY, panel.Width, panel.Height));
                if (pageCount == data.Rows.Count - 1)
                    e.HasMorePages = false;
                else
                {
                    e.HasMorePages = true;
                    pageCount++;
                    return;
                }
            }

        });
        
        form.printer.Document = pd;
        try
        {
            // MessageBox.Show(pd.PrinterSettings.ToString());
            if (((CheckBox)Controls["chkPrint"]).Checked)
                pd.DefaultPageSettings.PaperSize = new PaperSize("label", 291, 826);
            else
                pd.DefaultPageSettings.PaperSize = new PaperSize("label", 826, 291);
            pd.Print();
            lcOK = true;
        }
        catch (Exception ex)
        {
            lcOK = false;
            MessageBox.Show(ex.Message);
        }
        return lcOK;

The barcode is generated with the IronBarCod library

        private Image GenerateBarcode(string text, DataRow dataRow, TextBox ctrl)
    {
        string toData = text.Replace('[', ' ').Replace(']', ' ').Trim();
        if (dataRow.Table.Columns.Contains(toData))
        {
            if (dataRow[toData].ToString().Trim() != String.Empty)
            {
                try
                {
                    return BarcodeWriter.CreateBarcode(dataRow[toData].ToString(), BarcodeEncoding.Code128).ToBitmap();
                }
                catch (Exception e)
                {
                    return new Bitmap(1, 1);
                }
            }
            else return null;
        }
        else return null;
    }

although I have tried with BarCodeLib and GenCode128 with identical result.

The thing is that if I print by default in horizontal mode, everything works perfectly, the problem is that the print can be horizontal and vertical, for which I do a Graphics.rotatetransform(90) and this is when the label is printed correctly , but the barcode lines are printed a bit shaded, enough that the reader doesn't understand them anymore.

Can you give me a hand please?

Thank you very much in advance.