As per latest Amendment,
TDS in case of JOB work according to specification(brief):In case of work contract being manufacturing or supplying product according to specification(by using material from such customer),tds shall be deducted on the invoice value excluding the value of material purchased from such customer,if such value is mentioned separately in the invoice.where the material component has not been separately mentioned in the invoice,tds shall be deducted on the whole value of the invoice.
Relevant clause of new section :is reproduced hereunder
EXPLANATION TO SECTION 194 C
(iv) work shall include
(a).......
(b).......
(e) manufacturing or supplying a product according to the requirement or specification of a customer by using material purchased from such customer,but does not include manufacturing or supplying a product according to the requirement or specification of a customer by using material purchased from a person, other than such customer.
subsection (3) Where any sum is paid or credited for carrying out any work mentioned in sub-clause (e) of clause (iv) of the Explanation, tax shall be deducted at source
(i) on the invoice value excluding the value of material, if such value is mentioned separately in the invoice; or
(ii) on the whole of the invoice value, if the value of material is not mentioned separately in the invoice.
So I think 194C is not attracted here. It should be treated as sale only.