Corrugated Box

Strength & rupture BST · Bursting Strength Test — pressure in kilopascals (kPa) at which the board ruptures. The classic quality-acceptance check. BFT · Bursting Frequency Test — resistance to repeated rupture, used when boards see high-fatigue handling. ECT · Edge Crush Test — edge-crush force; the single most direct predictor of how high your finished boxes can be stacked. RCT · Ring Crush Test — paper-level compressive strength, often paired with ECT. BCT · Box Compression Test — load a finished, glued box bears before collapse. Most relevant when shipping fully made cartons. Paper quality GSM · Grams per Square Metre Check — basis weight of the paper. The foundation of every spec sheet. COBB · Cobb Value Test — water absorbed by the paper surface in 60 seconds. Tells you how the board will behave in humid storage and transit. MC · Moisture Check — percentage of water in paper or board. Correlates directly with strength loss when out of range.

Tests | Working days GSM, MC | 1 day BST, BFT, ECT, RCT, COBB | 2 days BCT — full box compression | 3 days

1. Sign in at upcbma.com using your member account. 2. Hit Lab in the top nav and pick Kanpur Chapter, or jump straight to Book a test. 3. Pick the tests you need, sample count, preferred drop-off date, and a time slot. 4. Submit. The lab desk gets your booking instantly and emails a confirmation. 5. Drop the sample at the chapter office during the slot you chose. Your name, company, email, and phone pre-fill from your member profile — no re-typing.