| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. MTC IDENTIFICATION AND AUTHENTICITY | |||
| A1 | Verify MTC on manufacturer letterhead; unique certificate number; authorized signatory Acceptance: Letterhead, cert number, date, signatory, seal all present | Cl. 10 — Certification | OK NC NA HOLD |
| A2 | Verify BIS/ISI mark and CM/L licence number (where applicable for concrete tiles) Acceptance: ISI mark present on box; CM/L number valid; licence currency verified | Cl. 10 — BIS marking | OK NC NA HOLD |
| A3 | Verify batch and shade number on MTC matches box labels; single shade per area Acceptance: Batch/shade consistent across all boxes for given area; cross-check with challan | Cl. 10 — Shade control | OK NC NA HOLD |
| B. DIMENSIONAL VERIFICATION | |||
| B1 | Verify length, width, thickness, straightness and rectangularity reported on MTC Acceptance: Length/width tolerance ≤ ±0.5% or ±2 mm whichever lesser; thickness ±10%; straightness ±0.5% | Table 1 — Dimensional | OK NC NA HOLD |
| B2 | Verify surface flatness and warpage on MTC Acceptance: Centre curvature ≤ ±0.5%; edge curvature ≤ ±0.5%; warpage ≤ ±0.6% | Table 1 — Flatness | OK NC NA HOLD |
| C. PHYSICAL / MECHANICAL PROPERTIES | |||
| C1 | Verify water absorption (E%) reported on MTC per IS 13630 Part 2 Acceptance: Group BIa (vitrified) E ≤ 0.5%; BIIa E ≤ 6%; BIIb E ≤ 10%; BIII E > 10% | Cl. 4 — Water absorption | OK NC NA HOLD |
| C2 | Verify modulus of rupture (MOR) and breaking strength reported on MTC Acceptance: Vitrified MOR ≥ 35 N/mm²; ceramic floor MOR ≥ 22 N/mm²; concrete tile transverse strength per IS 1237 | Table 2 — Strength | OK NC NA HOLD |
| C3 | Verify abrasion / wear resistance (PEI class for glazed; deep abrasion for unglazed) Acceptance: Floor areas: PEI III–V depending on traffic; unglazed volume loss ≤ 275 mm³ | Cl. 6 — Wear | OK NC NA HOLD |
| C4 | For concrete flooring tiles (IS 1237): verify wet transverse strength and wearing resistance Acceptance: Wet transverse strength ≥ 3.0 N/mm² (general grade); wearing < 3.5 mm | Table 2 — IS 1237 strength | OK NC NA HOLD |