How to change ps file page background to transparent

In the case of this sample file, the white background is generated by the statements (the comments beginning with a percent sign added by me):

b [1 1 1] sc % set red, green, and blue to maximum, i.e. white

b 0 0 800 47 re % define a rectangle that describes the area

b f % fill the rectangle with the defined color

Note that the instructions like "sc" etc. are defined in the prologue section of the file.

And the file looks like generated by (or by a descendant of) the xpdf suite from a PDF file. Therefore the possibility of an algorithmic solution for stuff like this seems rather unlikeky

Hi,
Thank you for the reply.

The sample file can be retrieved on http://adbuilderdev.falconocp.com/companyname.ps

It has solid white background, and I need to change the background to transparent.

Thanks again for the help...

It depends on how the application generating the PostScript job implements the white background.

If you could supply a sample file, I possibly could give you some hints .

Helge