There are three parameters to qualify as job work transaction and these are as under:-
1. The ownership of the goods does not transfer to the job worker and the ownership remains with the principal.
2. Any treatment or process to be undertaken by the job-worker on the goods belonging to another registered person.
3. The job worker is required to carry out the process as per specification given by the principal.
If any one of the conditions is not fulfilled by you, you will not conform to the definition of job work defined under Section 2(68) of CGST Act.
In the situation given by you, the ownership is transferred. The activity mentioned by you is also not covered under 'any treatment or process'. You may be thinking about 'any treatment'.
Hence this transaction or activity cannot be called job work.