diff --git a/EgwCoreLib.BlazorTest/Pages/TestChart.razor.cs b/EgwCoreLib.BlazorTest/Pages/TestChart.razor.cs
index 9a26370..7897992 100644
--- a/EgwCoreLib.BlazorTest/Pages/TestChart.razor.cs
+++ b/EgwCoreLib.BlazorTest/Pages/TestChart.razor.cs
@@ -101,15 +101,15 @@ namespace EgwCoreLib.BlazorTest.Pages
                 answ.Add(currColor);
                 if (currColor > 7)
                 {
-                    colors.Add(new DoughnutStyling("#28FF69", "ccc"));
+                    colors.Add(new DoughnutStyling("#28FF69", "#00AA00"));
                 }
                 else if (currColor > 3)
                 {
-                    colors.Add(new DoughnutStyling("orange", "ccc"));
+                    colors.Add(new DoughnutStyling("orange", "#99AA00"));
                 }
                 else
                 {
-                    colors.Add(new DoughnutStyling("red", "ccc"));
+                    colors.Add(new DoughnutStyling("red", "#FF6969"));
                 }
             }
             return answ.ToArray();
diff --git a/EgwCoreLib.Razor/Doughnut.razor b/EgwCoreLib.Razor/Doughnut.razor
index ce566e4..dd282be 100644
--- a/EgwCoreLib.Razor/Doughnut.razor
+++ b/EgwCoreLib.Razor/Doughnut.razor
@@ -59,7 +59,14 @@
             {
                 Datasets = new[]
                 {
-                    new { Data = Data, BackgroundColor = BackgroundColor.Select(x=>x.color), borderColor = BackgroundColor.Select(x=>x.border), borderWidth= 0, offset= 1, borderRadius = 0 }
+                    new {
+                        Data = Data,
+                        BackgroundColor = BackgroundColor.Select(x=>x.color),
+                        BorderColor = BackgroundColor.Select(x=>x.border),
+                        BorderWidth = 1,
+                        offset= 1,
+                        borderRadius = 0
+                    }
                 },
                 Labels = Labels
             },
diff --git a/EgwCoreLib.Utils/EgwCoreLib.Utils.csproj b/EgwCoreLib.Utils/EgwCoreLib.Utils.csproj
index ad2e315..74f5a8e 100644
--- a/EgwCoreLib.Utils/EgwCoreLib.Utils.csproj
+++ b/EgwCoreLib.Utils/EgwCoreLib.Utils.csproj
@@ -19,6 +19,7 @@
     <PackageReference Include="DeviceId" Version="6.7.0" />
     <PackageReference Include="DeviceId.Windows" Version="6.6.0" />
     <PackageReference Include="DeviceId.Windows.Wmi" Version="6.6.0" />
+    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
     <PackageReference Include="NLog" Version="5.3.4" />
     <PackageReference Include="System.Drawing.Common" Version="7.0.0" />
     <PackageReference Include="System.Management" Version="8.0.0" />
diff --git a/EgwCoreLib.Utils/MachineDataValidator.cs b/EgwCoreLib.Utils/MachineDataValidator.cs
index 7bad3b1..e5da65e 100644
--- a/EgwCoreLib.Utils/MachineDataValidator.cs
+++ b/EgwCoreLib.Utils/MachineDataValidator.cs
@@ -1,4 +1,5 @@
-using System;
+using Newtonsoft.Json;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Security.Cryptography;
@@ -45,10 +46,34 @@ namespace EgwCoreLib.Utils
             }
         }
 
+        /// <summary>
+        /// Init classe validatore
+        /// </summary>
+        /// <param name="currMachineData"></param>
+        public MachineDataValidator(string rawData)
+        {
+            // inizializzo info di base
+            Dictionary<string, string> currMachineData = new Dictionary<string, string>();
+            if (!string.IsNullOrEmpty(rawData))
+            {
+                try
+                {
+                    currMachineData = JsonConvert.DeserializeObject<Dictionary<string, string>>(rawData);
+                }
+                catch (Exception exc)
+                { }
+            }
+        }
+
         #endregion Public Constructors
 
         #region Public Properties
 
+        public bool hasValidData
+        {
+            get => machTestData != null && machTestData.Count > 0;
+        }
+
         /// <summary>
         /// Restituisce HASH del codice impiego = payload utente
         /// </summary>
@@ -216,4 +241,4 @@ namespace EgwCoreLib.Utils
 
         #endregion Private Methods
     }
-}
+}
\ No newline at end of file