Meaning
International guidelines establish the exact laboratory conditions required to measure the diffuse blue reflectance factor of paper products. Adherence to the iso 2470 standard ensures that brightness measurements are consistent across different manufacturing sites globally. This consistency is essential for international trade.
Optical Measurement
Spectrophotometers used in paper testing must be calibrated to specific light sources to ensure accurate readings. The iso 2470 standard defines the spectral and geometric characteristics of the instrument used to determine the blue brightness value. This definition allows mills and buyers to compare brightness data directly, eliminating the risk of mismatched optical expectations.
Supply Agreement
Contracts for the sale of packaging board routinely cite international metrics to define the optical quality of the substrate. Specifying the iso 2470 standard in the technical annex of a supply contract binds the seller to deliver paperboard that meets the agreed brightness level under controlled conditions. This specification prevents disputes regarding the visual appeal of the packaging board before it is sent to the printing presses.
Quality Dispute
Disagreements over the brightness of delivered board can stall packaging production and lead to financial claims. If a converter claims that a batch of board is too dull, both parties rely on the iso 2470 standard as the neutral benchmark to resolve the issue. An independent laboratory can test the board according to this standard, and the results will determine which party bears the cost of the rejected shipment.
