Sir,
Honestly, the views were called to understand the nature of activity undertaken and to answer the query in a better way.
(i) regarding job work done on fabric, any job processing done on any of the production stage, right from fibre to the garment is covered under the defintion of Textile Processing and therefore exempted under Notification 25/2012 dated 20/06/12. Hence, no need for payment of any service tax on any such job work activity, irrespective of the amount of job work undertaken.
(ii) regarding process relating to blending, turning etc., such process does not amount to manufacture, However, it is just to be ensured that the supplier is thereafter carrying out any further process on such tools (which he surely would be doing) or further clearing goods to any other supplier. Hence, it appears no service tax liability on job worker, as excise duty is surely been paid by the suppliers or is under exemption from payment of excise duty due to not crossing the threshold exemption limit by the supplier
In both the cases,in view of above, it is therefore assumed that service tax liability shall not arise on the job worker. Also, it seems that activities are carried on without the aid of power.