Forum Moderators: not2easy
She will already know that producing very high quality prints from slides is not possible - slide film does not have have the same depth or quality as photo negative. She should expect to see some flaws/reductions that you may be able to remove and enhance using an image editor.
Introducing any intermediate generation - in this case, a print, will only degrade final image quality. If the original slides are availble (and it is not clear from the first post if they are) scan them directly.
>quality prints from slides is not possible - slide film does not have have the same depth or quality as photo negative.
Slide, or transparency film, provides far and away the highest quality image possible. Color negative film is more forgiving of exposure errors, which may have led to your opinion that it supplies higher quality results. For regular prints, negative film is less contrasty, but when the image will be scanned and printed on a printing press or posted on the web, slides can provide the ultimate quality.
<<edited for clarity>>