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Table 3 Colour change of the Holmen paper caused by the nitrogen jet and the CO2 snow jet (±  SD)

From: Carbon dioxide snow cleaning of paper

  ∆L* ∆a* ∆b* ∆E ΔE2000
N2 jet − 0.10 (±  0.37) 0.00 (±  0.15) 0.11 (±  0.28) 0.50 (±  0.15) 0.35 (±  0.15)
CO2 snow jet − 0.34 (±  0.23) 0.12 (±  0.08) 0.19 (±  0.21) 0.43 (±  0.18) 0.37 (±  0.12)