5℅ GST applicable.... see this link - SAC : SERVICES BY WAY OF JOB WORK IN RELATION TO- (A) PRINTING OF NEWSPAPERS; (B) TEXTILE YARNS (OTHER THAN OF MAN-MADE FIBRES) AND TEXTILE FABRICS; (C) CUT AND POLISHED DIAMONDS; PRECIOUS AND SEMI-PRECIOUS STONES; OR PLAIN AND STUD- DED JEWELLERY OF GOLD AND OTHER PRECIOUS METALS, FALLING UNDER CHAPTER OF HSN; (D) PRINTING OF BOOKS (INCLUDING BRAILLE BOOKS), JOURNALS AND PERIODICALS; (E) PROCESSING OF HIDES, SKINS AND LEATHER FALLING UNDER CHAPTER 41 OF HSN.
Find more on GST Act https://play.google.com/store/apps/details?id=com.offlineappsindia.gst&referrer=utm_source%3Dsac_share%26utm_campaign%3Dvia_app