I have a larger document (book class) which should be typeset double-sided, i.e. with the twopage class option. However, in my appendix I have some technical diagrams which should not be printed double-sided but on an odd page with the following even page of the same sheet being empty, like it would be for a printed one-sided (onepage) document which is printed only on one side. These pages do not include a page number and are inserted using \includepdf (pdfpages package) or an \includegraphics with some extra commands around it.
How can I enable this pseudo-onepage mode? I might need to switch back to the normal mode for a later, different appendix. Basically an empty page must be inserted after every normal page. I don't want to manually add \clearpage\thispagestyle{empty}\cleardoublepage after every real page.