AIP Publishing declared to remove publication page charges and color charges from all organisation’s’ journals on effect from January 1, 2018. The journals include Physics of Plasmas, Review of Scientific Instruments, and 10 other well-known peer-reviewed physical science titles. This initiative is taken to eliminate the charges barriers and facilitate emerging shifts in scholarly communication.
Reference: http://www.stm-publishing.com/aip-publishing-eliminates-publication-page-charges-across-all-journals/?wt=3