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Table 6 Colour change of the Holmen paper caused by the accelerated aging (±  SD)

From: Carbon dioxide snow cleaning of paper

  ΔL* Δa* Δb* ΔE* ΔE2000
Wallmaster 3.88 (± 0.14) − 1.53 (± 0.08) 0.55(± 0.06) 4.21 (± 0.15) 2.69 (± 0.14)
Wishab 3.88 (± 0.20) − 1.37 (± 0.21) 0.50 (± 0.06) 4.15 (0.24) 2.63 (± 0.21)
Groom/Stick 3.88 (0.15) − 1.52 (± 0.13) 0.59 (± 0.07) 4.21 (± 0.15) 2.69 (± 0.15)
Faber Castell 3.81 (± 0.14) − 1.49 (± 0.14) 0.57 (± 0.08) 4.14 (± 0.14) 2.65 (± 0.15)
Nitrogen jet 3.69 (± 0.19) − 1.64 (± 0.22) 0.67 (± 0.07) 4.10 (± 0.15) 2.68 (± 0.17)
CO2 snow jet 3.87 (± 0.15) − 1.74 (± 0.16) 0.71 (± 0.09) 4.30 (± 0.13) 2.83 (± 0.15)
Reference 3.95 (± 0.10) − 1.62 (± 0.11) 0.70 (± 0.08) 4.33 (± 0.12) 2.85 (± 0.13)