The publishing house I am going to publish a book with demands no page number on the first page of each chapter. I used \thispagestyle{empty} in most cases and had to use \renewcommand{\bibsetup}{\thispagestyle{empty}} for no number on the first page of the bibliography. But I could not find a solution for no page number on the first page of the Indexes. Is there anything like \bibsetup which works for the Indexes? You will see below that I tried already with \addtocontents{toc}{\protect\thispagestyle{empty}}, but it did not work.
Here is an excerpt of my file:
\documentclass[14pt,twoside]{book}
\usepackage{imakeidx}
\usepackage{fancyhdr, blindtext}
\begin{document}
%then the text
\cleardoublepage
\addcontentsline{toc}{chapter}{Bibliography}
\renewcommand{\bibsetup}{\thispagestyle{empty}}
\printbibliography
%this command works nicely
\thispagestyle{empty}
\addcontentsline{toc}{chapter}{Index}
\addtocontents{toc}{\protect\thispagestyle{empty}}
\thispagestyle{empty}
\printindex
\end{document}