| 
      
        | Laboratory | Dry weight of painta (mg∙cm)-2
 | Paint thicknessb (µm) |  
        | mean | Std. dev. |  
        | 1 | NR NR
 | 46.3 40.8
 | 6.2 6.5
 |  
        | 2 | 15.3 13.5
 | 89.5c 83.5c
 | _ _
 |  
        | 3 | 10.8 10.1
 | 53.0 56.1
 | 6.5 5.4
 |  
        | 4 | 8.2 7.4
 | 39.1 SNR
 | 4.7 _
 |  
        | 5 | 31 33
 | 107 123
 | 15 16
 |  
        | 6 | 10 13
 | 43.4 65.6
 | 5.3 9.2
 |  
        | 7 | 17.7 17.3
 15
 15
 | 58.7 50.8
 56.9
 52.1
 | 3.3 3.5
 1.6
 1.4
 |  
        | 8 | NR NR
 | 80.8 59.0
 | 13.5 7.8
 |  
        | 9 | 12.5 9.5
 | 60.8 52.2
 | 4.5 5.5
 |  
        | 10 | 30 30
 | 103 SNR
 | 13 _
 |  
        | 11 | 51.7 _
 | 56.0 _
 | 5.5 _
 |  
        | 12 | 8.4 9.0
 | 65.2 65.0
 | 8.9 4.9
 |  
        | 13 | 10.3 10.2
 | 68.6 60.2
 | 2.4 2.7
 |  
        | 14 | 11.5 11.5
 | 69.3 64.7
 | 4.9 4.5
 |  
        | 15 | _ 28.9
 | _ SNR
 | _ _
 |  
        | 16 | 21 22
 | SNR SNR
 | _ _
 |  
        | 17 | 12.3 _
 | SNR _
 | _ _
 |  
        | 18 | 26.8 | 70.6 | 18.0 |  
        | Mean of all runsd,e            18.9 ± 11.6 Mean of selected runs      12.1 ± 2.9                           60.5d
 |  | 
  
    | a. Reported by the participants; NR = not reported. b. Measured at the Environment Institute (Ispra) by digital film gauge; SNR =
 sample not received.
 c. Glass plate, measurement by material profiling technique.
 d. Runs for which the mean paint thickness was in the range between 50.8 and
      70.6 μm.
 e. With exception of the two values reported by laboratories ns. 11 and 18, which
    are outliers
 | 
  
    | Table 4: Thickness of the paint samples (adopted and modified from ECA report
    no 16, 1995 [25]). |