Header OK when printed but gray when PDF emailed

We are using WPTools 4.09 and wPDF 3.5 and have a problem that when a document is printed it looks OK similarly when the initial PDF from wPDF is viewed it looks fine but when saved to disk and emailed the text in the header is being rendered in gray

Initially we thought it might have been a problem with images in the header but even with plain text this graying happens. ( all text colours come out as gray in the PDF header )

I've tried setting/resetting the ViewOptions flag wpDontGrayHeaderFooterInLayout on the TWPRichText but it seems to have made no difference to the end result

Is there anything else I can try within the wPDF settings ?

This "gray on emailing" is becoming more of a problem in that some accounts offices are using it as a reason to delay or refuse payment.

Any help welcome ;-)

Is there any attribute either in WPTools or in wPDF which can turn off the graying of the headers ?

All we are doing to convert for email is this

WPDF_Start('user', 'password');
pdf := TWPPDFExport.Create(nil);
pdf.DLLName := Working_Directory + 'WPDF300A.DLL';
pdf.Source := wprtDocument;
try
pdf.FileName := AdsDataPath + '\' + fDocName + '.pdf';
pdf.Print
finally
pdf.free
end;

EMailDocForm.ListBox1.Items.Add(AdsDataPath + '\' + fDocName + '.pdf');

Note : wprtDocument is an instance of TWPRichText,
AdsDataPath is the location of the Advantage Database tables used in this product

We have tried using the wPDF attribute :

pdf.CanvasReference := wprefPrinter;

We have tried at the TWPRichText level by adding wpDontGrayHeaderFooterInLayout into ViewOptions

We still get the greyed headers on saving

Is there anything else we can do ?

Adding

pdf.HeaderFooterColor := clNone;

seems to have helped ( found by reading http://www.wpcubed.com/manuals/wpdf/textrendering.htm )

Hope this may be useful to others ;-)