diff --git a/QRCoder/PostscriptQRCode.cs b/QRCoder/PostscriptQRCode.cs
index c3064644..99f86065 100644
--- a/QRCoder/PostscriptQRCode.cs
+++ b/QRCoder/PostscriptQRCode.cs
@@ -1,5 +1,6 @@
 #if !NETSTANDARD1_3
 using System.Drawing;
+using System.Text;
 using static QRCoder.QRCodeGenerator;
 
 namespace QRCoder;
@@ -100,35 +101,42 @@ public string GetGraphic(Size viewBox, Color darkColor, Color lightColor, bool d
         var drawableModulesCount = QrCodeData.ModuleMatrix.Count - (drawQuietZones ? 0 : offset * 2);
         var pointsPerModule = (double)Math.Min(viewBox.Width, viewBox.Height) / (double)drawableModulesCount;
 
-        string psFile = string.Format(CultureInfo.InvariantCulture, PS_HEADER, new object[] {
+        var estimatedCapacity = PS_HEADER.Length + PS_FUNCTIONS.Length + PS_FOOTER.Length +
+            (drawableModulesCount * drawableModulesCount * 2) + // modules (either "f " or "b ")
+            drawableModulesCount * 3 + // newlines ("nl\n")
+            200; // embedded numbers
+        var sb = new StringBuilder(estimatedCapacity);
+
+        sb.AppendFormat(CultureInfo.InvariantCulture, PS_HEADER, [
             CleanSvgVal(viewBox.Width), CleanSvgVal(pointsPerModule),
             epsFormat ? "EPSF-3.0" : string.Empty
-        });
-        psFile += string.Format(CultureInfo.InvariantCulture, PS_FUNCTIONS, new object[] {
+        ]);
+        sb.AppendFormat(CultureInfo.InvariantCulture, PS_FUNCTIONS, [
             CleanSvgVal(darkColor.R /255.0), CleanSvgVal(darkColor.G /255.0), CleanSvgVal(darkColor.B /255.0),
             CleanSvgVal(lightColor.R /255.0), CleanSvgVal(lightColor.G /255.0), CleanSvgVal(lightColor.B /255.0),
             drawableModulesCount
-        });
+        ]);
 
         for (int xi = offset; xi < offset + drawableModulesCount; xi++)
         {
             if (xi > offset)
-                psFile += "nl\n";
+                sb.Append("nl\n");
             for (int yi = offset; yi < offset + drawableModulesCount; yi++)
             {
-                psFile += (QrCodeData.ModuleMatrix[xi][yi] ? "f " : "b ");
+                sb.Append(QrCodeData.ModuleMatrix[xi][yi] ? "f " : "b ");
             }
-            psFile += "\n";
         }
-        return psFile + PS_FOOTER;
+        sb.Append('\n');
+        sb.Append(PS_FOOTER);
+        return sb.ToString();
     }
 
     /// <summary>
     /// Cleans double values for international use/formats.
     /// </summary>
     /// <param name="input">The input double value.</param>
-    /// <returns>Returns the cleaned string representation of the double value.</returns>
-    private static string CleanSvgVal(double input) => input.ToString(System.Globalization.CultureInfo.InvariantCulture);
+    /// <returns>Returns the cleaned string representation of the double value, with a maximum of 7 significant digits.</returns>
+    private static string CleanSvgVal(double input) => input.ToString("G7", CultureInfo.InvariantCulture);
 
     // Note: line terminations here will encode differently based on which platform QRCoder was compiled on (CRLF vs LF);
     // however, PostScript interpreters should handle both equally well.
diff --git a/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_colors.approved.txt b/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_colors.approved.txt
index 4d1872cf..60e52670 100644
--- a/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_colors.approved.txt
+++ b/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_colors.approved.txt
@@ -50,70 +50,38 @@ grestore
 gsave
 sc sc scale
 0 33 1 sub translate
-b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b 
-nl
-b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b 
-nl
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+b b b b f b f f f b f b f b f f f b f b b f f b f f f f f b b b b nl
+b b b b f b f f f b f b f b b f b b f b f b f b f f b f b b b b b nl
+b b b b f b b b b b f b f f f f b f f b b f b b f f f b b b b b b nl
+b b b b f f f f f f f b f b b b b f b b b f f b b b f f f b b b b nl
+b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b nl
+b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b nl
+b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b nl
 b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b 
 %%EndBody
 grestore
diff --git a/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_eps.approved.txt b/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_eps.approved.txt
index 370c3675..6a4b0410 100644
--- a/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_eps.approved.txt
+++ b/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_eps.approved.txt
@@ -50,70 +50,38 @@ grestore
 gsave
 sc sc scale
 0 33 1 sub translate
-b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b 
-nl
-b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b 
-nl
-b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b 
-nl
-b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b 
-nl
-b b b b f f f f f f f b f b f b f b b b f b f f f f f f f b b b b 
-nl
-b b b b f b b b b b f b b f f f f b b b b b f b b b b b f b b b b 
-nl
-b b b b f b f f f b f b f f f b b f f b b b f b f f f b f b b b b 
-nl
-b b b b f b f f f b f b f f f b f f f f f b f b f f f b f b b b b 
-nl
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 b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b 
 %%EndBody
 grestore
diff --git a/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_simple.approved.txt b/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_simple.approved.txt
index 93c83ee7..0fd16ade 100644
--- a/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_simple.approved.txt
+++ b/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_simple.approved.txt
@@ -50,70 +50,38 @@ grestore
 gsave
 sc sc scale
 0 33 1 sub translate
-b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b 
-nl
-b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b 
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 %%EndBody
 grestore
diff --git a/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_size.approved.txt b/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_size.approved.txt
index 41dde38f..709bc3a1 100644
--- a/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_size.approved.txt
+++ b/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_size.approved.txt
@@ -50,70 +50,38 @@ grestore
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 grestore
diff --git a/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_size_no_quiet_zones.approved.txt b/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_size_no_quiet_zones.approved.txt
index 006f2148..cc78b5a0 100644
--- a/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_size_no_quiet_zones.approved.txt
+++ b/QRCoderTests/PostscriptQRCodeRendererTests.can_render_postscript_qrcode_size_no_quiet_zones.approved.txt
@@ -50,54 +50,30 @@ grestore
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 grestore
diff --git a/QRCoderTests/TransposeVerificationTests.postscript_renderer.approved.ps b/QRCoderTests/TransposeVerificationTests.postscript_renderer.approved.ps
index 0aef3dfa..52ac1b8c 100644
Binary files a/QRCoderTests/TransposeVerificationTests.postscript_renderer.approved.ps and b/QRCoderTests/TransposeVerificationTests.postscript_renderer.approved.ps differ