Goods cannot be called finished goods until and unless these are packed/packaged properly so that these become marketable. Goods are neither safe nor marketable without packing. Packing is also process of manufacture. Can you sell /supply the goods without packing container ?See the definition of job work given below:
(1) Meaning of Job work
(a) Job work [Section 2(68) of CGST Act, 2017]. - “Job work” means any treatment or process undertaken by a person on goods belonging to another registered person and the expression “job worker” shall be construed accordingly.
Supply of goods by the Principal to the job worker for job work is not supply. No GST is levaible but subject to Section 143 of CGST Act, 2017. If job worker supply these goods to another person after doing job work then it is supply.
See Explanation below Sub section (5) to Section 143. For the purpose of job work, input includes intermediate goods arising from any treatment or process carried out on the inputs by the principal or the job worker.
Your goods are semi-finished/intermediate goods without the process of packing.
Read word for word carefully.