C1a
|
1.1
|
30
|
Probably paint layer (noisy spectrum)
|
|
Wax and uppermost varnish removed, second upper varnish mostly removed, overpaint mostly removed; increased surface roughness
|
65 ± 21
|
The band at 473 ± 5 nm is reduced in intensity and red shifted to 483 ± 5 nm after cleaning
A new band appears at 610 ± 5 nm
|
C1b
|
1.1
|
20
|
Probably paint layer (noisy spectrum)
|
|
Wax and uppermost varnish removed, second upper varnish mostly removed, overpaint mostly removed; increased surface roughness
|
69 ± 18
|
C2a
|
0.9
|
50
|
Probably paint layer (noisy spectrum)
|
|
Wax and two upper varnishes removed, overpaint mostly left; increased surface roughness
|
55 ± 14
|
C2b
|
0.9
|
40
|
Probably paint layer (noisy spectrum)
|
C3a
|
0.9
|
20
|
Probably paint layer
|
|
Wax and two upper varnishes almost removed, overpaint not removed; increased surface roughness
|
42 ± 12
|
C3b
|
0.9
|
10
|
Natural varnish
|
|
Wax and uppermost varnish removed, second upper varnish reduced, overpaint intact
|
30 ± 6
|
Emission intensity is increased after laser irradiation. No other changes are observed
|
C4
|
0.7
|
25
|
Natural varnish
|
|
Wax and uppermost varnish partially removed, second upper varnish and overpaint not removed
|
19 ± 5
|
C5
|
0.7
|
46
|
Probably paint layer (noisy spectrum)
|
|
Wax and uppermost varnish removed, second upper varnish locally left, overpaint not removed; increased surface roughness
|
34 ± 10
|
The main band at 473 ± 5 nm is reduced in intensity and red shifted to 483 ± 5 nm after cleaning
A new band appears at 610 ± 5 nm
|