| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. MTC IDENTIFICATION AND AUTHENTICITY | |||
| A1 | Verify MTC on manufacturer letterhead; unique certificate number; authorized signature Acceptance: Letterhead, cert no., date, signatory, seal all present | Cl. 9 — Certification | OK NC NA HOLD |
| A2 | Verify ISI mark / BIS licence number on MTC and container where applicable Acceptance: Valid CM/L number printed; licence currency verified; ISI logo on container | Cl. 9 — BIS marking | OK NC NA HOLD |
| A3 | Verify batch/shade code on MTC matches container labels and delivery challan Acceptance: Shade code consistent; single shade per area; MTC-challan-container linkage intact | Cl. 9 — Traceability | OK NC NA HOLD |
| B. PHYSICAL PROPERTIES VERIFICATION | |||
| B1 | Verify volume solids / non-volatile matter content reported on MTC Acceptance: Enamel: NVM ≥ 48% by mass; Emulsion interior ≥ 35%; Exterior emulsion ≥ 45% | Table 1 — Non-volatile | OK NC NA HOLD |
| B2 | Verify drying time (surface dry, hard dry) on MTC per IS 101 Part 3 Acceptance: Enamel: surface dry ≤ 6 hr, hard dry ≤ 16 hr; emulsion: surface dry ≤ 30 min | Table 1 — Drying | OK NC NA HOLD |
| B3 | Verify fineness of grind (Hegman gauge) reported on MTC Acceptance: Fineness ≤ 40 microns for enamel; ≤ 50 microns for emulsion | Cl. 5 — Fineness | OK NC NA HOLD |
| B4 | Verify viscosity / consistency (Ford cup or Krebs Stormer) on MTC Acceptance: Viscosity within manufacturer's stated range; workable at spec temperature | Cl. 5 — Viscosity | OK NC NA HOLD |
| C. FILM PROPERTIES & DURABILITY | |||
| C1 | Verify opacity / hiding power / spreading rate reported on MTC Acceptance: Enamel spread 14-16 sqm/L; emulsion 140-160 sqft/L per coat; opacity per IS 101 pass | Table 1 — Opacity | OK NC NA HOLD |
| C2 | Verify gloss / sheen at 60° (for enamel) and scrub resistance (for emulsion) Acceptance: Enamel 60° gloss ≥ 90 units; interior emulsion scrub ≥ 1000 cycles; exterior ≥ 5000 cycles | Table 1 — Gloss/Scrub | OK NC NA HOLD |
| C3 | Verify flexibility (mandrel bend) and adhesion (cross-cut) on MTC Acceptance: No cracking on 6 mm mandrel bend; adhesion rating 0-1 (ASTM D3359/IS) | Cl. 7 — Mechanical | OK NC NA HOLD |
| C4 | For exterior emulsion — verify weather / UV resistance, alkali resistance on MTC Acceptance: Accelerated weathering 500-1000 hr without chalking/flaking; alkali resistance 72 hr no damage | Cl. 6 — Durability | OK NC NA HOLD |