Manufacture and excisability turn on new commercial identity, not on quality standards or prior dropped proceedings.

Constructive res judicata did not bar reconsideration of excisability where the governing legal position had changed, and the earlier dropping of proceedings was not conclusive. Conformity of the products with Indian Standard specifications or the Drugs and Cosmetics Act did not exclude excise duty, and equitable estoppel failed absent a clear revenue representation acted upon by the assessee. Converting ash or vibuthi into tooth powder was held to be manufacture because the process created a commercially distinct product with a new name, character, and use, bringing it within the tariff entry for preparations for oral or dental hygiene. The products were therefore treated as excisable goods.

---

---

Issues: (i) Whether the earlier dropping of proceedings barred the revenue from reopening excisability on the ground of constructive res judicata; (ii) whether the petitioner's products were outside excise duty because they were said to conform to Indian Standard specifications and the Drugs and Cosmetics Act, 1940, and whether equitable estoppel prevented levy; (iii) whether converting ash or vibuthi into tooth powder amounted to manufacture under Section 2(f) and attracted Tariff Item 33.06.

Issue (i): Whether the earlier dropping of proceedings barred the revenue from reopening excisability on the ground of constructive res judicata.

Analysis: The earlier position could not be treated as conclusive because the governing legal approach had changed. The factory-based objection under Section 2(m) of the Factories Act, 1948 was no longer relevant to the levy question, and the Court held that the doctrine of constructive res judicata could not prevent reconsideration where the law applicable to the levy had altered.

Conclusion: The plea of constructive res judicata failed against the assessee.

Issue (ii): Whether the petitioner's products were outside excise duty because they were said to conform to Indian Standard specifications and the Drugs and Cosmetics Act, 1940, and whether equitable estoppel prevented levy.

Analysis: The Court found no legal basis for excluding excise merely because the goods also satisfied other quality or regulatory standards. On the materials before it, the products were shown to conform to the relevant standards, but that did not take them outside the excise enactment. The doctrine of equitable estoppel also was unavailable because no clear representation by the revenue, acted upon by the petitioner, was established.

Conclusion: These contentions were rejected and did not bar the levy.

Issue (iii): Whether converting ash or vibuthi into tooth powder amounted to manufacture under Section 2(f) and attracted Tariff Item 33.06.

Analysis: Manufacture was held to require a transformation resulting in a new and different commercial article with a distinct name, character, or use. On the facts, ash or vibuthi underwent processing and became tooth powder, a commercially distinct product used for oral or dental hygiene. The Court held that the product fell within the expression covering preparations for oral or dental hygiene, including dentifrices, and that the process adopted completed a manufactured product within Section 2(f).

Conclusion: The process amounted to manufacture and the products were liable to excise duty under Tariff Item 33.06.

Final Conclusion: The writ petition was held not maintainable on the asserted bars and failed on the merits because the petitioner's tooth powder products were treated as manufactured excisable goods.

Ratio Decidendi: A process amounts to manufacture when it brings into existence a new and different commercially identifiable product with a distinct name, character, or use, and such levy cannot be avoided by relying on prior administrative dropping of proceedings, quality standards, or equitable estoppel in the absence of a legally operative bar.

---