I have gallery of thousands of images. All of them at some point needs to be indexed. However after some period of time, some of them should be removed from search engine index while they should remain on my site.
My question: is there HTML tag, something as
rel="nofollow" which ll tell search engines, to no longer keep in index image in question?
I know for disavow tool, or use URL removal option from Google webmaster tools etc, but that's really not an option in my case.
Edit: Just found that i can add The
X-Robots-Tag to the header of the image (generated by the PHP). But will Google remove that image from image search (because image in question will be already indexed)?