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)