diff --git a/components/fpspreadsheet/source/common/fpschart.pas b/components/fpspreadsheet/source/common/fpschart.pas
index 4684b1593..e4ccd6f1c 100644
--- a/components/fpspreadsheet/source/common/fpschart.pas
+++ b/components/fpspreadsheet/source/common/fpschart.pas
@@ -3008,6 +3008,8 @@ constructor TsChart.Create;
 begin
   inherited Create(nil);
 
+  CreateRawFillPatterns;
+
   FLineStyles := TsChartLineStyleList.Create;
   clsFineDot := FLineStyles.Add('fine-dot', 100, 1, 0, 0, 100, false);
   clsDot := FLineStyles.Add('dot', 500, 1, 0, 0, 500, true);
@@ -3101,6 +3103,9 @@ begin
   FFillPatterns.Free;
   FGradients.Free;
   FLineStyles.Free;
+
+  DestroyRawFillPatterns;
+
   inherited;
 end;
 
diff --git a/components/fpspreadsheet/source/common/fpsopendocumentchart.pas b/components/fpspreadsheet/source/common/fpsopendocumentchart.pas
index cc61de459..08830449c 100644
--- a/components/fpspreadsheet/source/common/fpsopendocumentchart.pas
+++ b/components/fpspreadsheet/source/common/fpsopendocumentchart.pas
@@ -2160,11 +2160,11 @@ begin
   else
     hatchAngle := 0;
 
-  fillPatternIdx := workbook.RawFillPatterns.FindLinePatternIndex(hatchDist, hatchAngle, 0.1, patternMultiplier);
+  fillPatternIdx := GetRawFillPatternIndex(hatchDist, hatchAngle, 0.1, patternMultiplier);
   if fillPatternIdx = -1 then
   begin
-    fillPatternName := Format('LinePattern%d', [workbook.RawFillPatterns.Count]);
-    fillPatternIdx := workbook.RawFillPatterns.AddLineFillPattern(fillPatternName, hatchDist, hatchAngle, 0.1, patternMultiplier);
+    fillPatternName := Format('LinePattern%d', [GetRawFillPatternCount]);
+    fillPatternIdx := RegisterRawFillPattern(fillPatternName, hatchDist, hatchAngle, 0.1, patternMultiplier);
   end;
   AChart.FillPatterns.AddPattern(styleName, fillPatternIdx, hatchColor); //, bgColor);    // wp: bgColor ????
 end;
@@ -2649,7 +2649,7 @@ begin
         if (AFill.Pattern < 0) or (AChart.FillPatterns.Count = 0) then
           exit;
         coloredFillPattern := AChart.FillPatterns[AFill.Pattern];
-        rawFillPattern := workbook.RawFillPatterns[coloredFillPattern.Index];
+        rawFillPattern := GetRawFillPattern(coloredFillPattern.Index);
         if Assigned(rawFillPattern.LinePattern) then
         begin
           if (AFill.Color.Transparency > 0) then
@@ -3768,7 +3768,7 @@ begin
   for i := 0 to AChart.FillPatterns.Count-1 do
   begin
     coloredFillPattern := AChart.FillPatterns[i];
-    rawFillPattern := wBook.RawFillPatterns[coloredFillPattern.Index];
+    rawFillPattern := GetRawFillPattern(coloredFillPattern.Index);
     if Assigned(rawFillPattern.LinePattern) then
     begin
       style := Format(indent +
diff --git a/components/fpspreadsheet/source/common/fpspatterns.pas b/components/fpspreadsheet/source/common/fpspatterns.pas
index 57b858dfd..211d2e03d 100644
--- a/components/fpspreadsheet/source/common/fpspatterns.pas
+++ b/components/fpspreadsheet/source/common/fpspatterns.pas
@@ -129,6 +129,15 @@ type
     property Items[AIndex: Integer]: TsRawFillPattern read GetItem write SetItem; default;
   end;
 
+procedure CreateRawFillPatterns;
+procedure DestroyRawFillPatterns;
+
+function GetRawFillPattern(APatternIndex: Integer): TsRawFillPattern;
+function GetRawFillPatternCount: Integer;
+function GetRawFillPatternIndex(ALineDistance, ALineAngle, ALineWidth: Single; AMultiplier: TsLineFillPatternMultiplier): Integer;
+
+function RegisterRawFillPattern(AName: String; ALineDistance, ALineAngle, ALineWidth: Single;
+  AMultiplier: TsLineFillPatternMultiplier): Integer;
 
 implementation
 
@@ -632,5 +641,71 @@ begin
   TsRawFillPattern(inherited Items[AIndex]).CopyFrom(AValue);
 end;
 
+{ ------------------------------------------------------------------------------
+                          global procedures
+-------------------------------------------------------------------------------}
+var
+  RawFillPatterns: TsRawFillPatternList = nil;
+  RawFillPatterns_ReferenceCounter: Integer = 0;
+
+procedure CreateRawFillPatterns;
+begin
+  if RawFillPatterns_ReferenceCounter = 0 then
+  begin
+    RawFillPatterns := TsRawFillPatternList.Create;
+    RawFillPatterns.AddBuiltinPatterns;
+  end;
+  inc(RawFillPatterns_ReferenceCounter);
+end;
+
+procedure DestroyRawFillPatterns;
+begin
+  dec(RawFillPatterns_ReferenceCounter);
+  if RawFillPatterns_ReferenceCounter <= 0 then
+  begin
+    FreeAndNil(RawfillPatterns);
+    RawFillPatterns_ReferenceCounter := 0;
+  end;
+end;
+
+function GetRawFillPattern(APatternIndex: Integer): TsRawFillPattern;
+begin
+  if Assigned(RawFillPatterns) then
+    Result := RawFillPatterns.Items[APatternIndex]
+  else
+    Result := nil;
+end;
+
+{ Finds the index of the line fill pattern having the specified parameters.
+  Returns -1 if not found. }
+function GetRawFillPatternIndex(ALineDistance, ALineAngle, ALineWidth: Single;
+  AMultiplier: TsLineFillPatternMultiplier): Integer;
+begin
+  if Assigned(RawFillPatterns) then
+    Result := RawFillPatterns.FindLinePatternIndex(ALineDistance, ALineAngle, ALineWidth, AMultiplier)
+  else
+    Result := -1;
+end;
+
+function GetRawFillPatternCount: Integer;
+begin
+  if Assigned(RawFillPatterns) then
+    Result := RawFillPatterns.Count
+  else
+    Result := 0;
+end;
+
+function RegisterRawFillPattern(AName: String; ALineDistance, ALineAngle, ALineWidth: Single;
+  AMultiplier: TsLineFillPatternMultiplier): Integer;
+begin
+  if Assigned(RawFillPatterns) then
+    Result := RawFillPatterns.AddLineFillPattern(AName, ALineDistance, ALineAngle, ALineWidth, AMultiplier)
+  else
+    Result := -1;
+end;
+
+finalization
+  FreeAndNil(RawFillPatterns);
+
 end.
 
diff --git a/components/fpspreadsheet/source/common/fpspreadsheet.pas b/components/fpspreadsheet/source/common/fpspreadsheet.pas
index 55487c7aa..1ee3d7001 100644
--- a/components/fpspreadsheet/source/common/fpspreadsheet.pas
+++ b/components/fpspreadsheet/source/common/fpspreadsheet.pas
@@ -822,7 +822,6 @@ type
   {$ifdef FPS_CHARTS}
   protected
     FCharts: TsChartList;
-    FRawFillPatternList: TsRawFillPatternList;
   {$endif}
 
   public
@@ -982,11 +981,6 @@ type
     {@@ Workbook metadata}
     property MetaData: TsMetaData read FMetaData write FMetaData;
 
-    {$ifdef FPS_CHARTS}
-    {@@ Raw fill patterns for charts }
-    property RawFillPatterns: TsRawFillPatternList read FRawFillPatternList;
-    {$endif}
-
     {@@ This event fires whenever a new worksheet is added }
     property OnAddWorksheet: TsWorksheetEvent read FOnAddWorksheet write FOnAddWorksheet;
     {@@ This event fires whenever a worksheet is changed }
@@ -6652,8 +6646,6 @@ begin
   FEmbeddedObjList := TFPList.Create;
 
  {$ifdef FPS_CHARTS}
-  FRawFillPatternList := TsRawFillPatternList.Create;
-  FRawFillPatternList.AddBuiltinPatterns;
   FCharts := TsChartList.Create;
  {$endif}
 
@@ -6694,7 +6686,6 @@ begin
   FEmbeddedObjList.Free;
  {$ifdef FPS_CHARTS}
   FCharts.Free;
-  FRawFillPatternList.Free;
  {$endif}
 
   inherited Destroy;
diff --git a/components/fpspreadsheet/source/common/xlsxooxmlchart.pas b/components/fpspreadsheet/source/common/xlsxooxmlchart.pas
index 47ad2b437..d063ff89c 100644
--- a/components/fpspreadsheet/source/common/xlsxooxmlchart.pas
+++ b/components/fpspreadsheet/source/common/xlsxooxmlchart.pas
@@ -3669,7 +3669,7 @@ begin
           if (AFill.Pattern < 0) or (AChart.FillPatterns.Count = 0) then
             exit;
           coloredPattern := AChart.FillPatterns[AFill.Pattern];
-          rawPattern := workbook.RawFillPatterns[coloredPattern.Index];
+          rawPattern := GetRawFillPattern(coloredPattern.Index);
          // hatch := AChart.Hatches[AFill.Hatch];
           presetIdx := -1;
           for i := 0 to High(OOXML_PATTERN_NAMES) do