diff --git a/UI/CaptureView.cs b/UI/CaptureView.cs
--- a/UI/CaptureView.cs
+++ b/UI/CaptureView.cs
@@ -80,6 +80,7 @@ namespace DesertPaintLab
         {
             recordEnabled = false;
             recordButton.Sensitive = false;
+            recordNoReactionButton.Sensitive = false;
         }
 
         public void EnableRecord()
@@ -154,8 +155,11 @@ namespace DesertPaintLab
             
             isCaptured = false;
             recordButton.Sensitive = false;
+            recordNoReactionButton.Sensitive = false;
             clearReactionButton.Sensitive = false;
             clearReactionButton.Visible = false;
+            recordNoReactionButton.Sensitive = false;
+            recordNoReactionButton.Visible = false;
     
             recipe.Clear();
             
@@ -167,6 +171,8 @@ namespace DesertPaintLab
                 unmodifiedSwatch.Clear();
                 reactionSwatch.Clear();
                 captureButton.Sensitive = false;
+                recordNoReactionButton.Sensitive = false;
+                recordNoReactionButton.Visible = false;
                 return;
             }
             recipe.AddReagent(reagentName);
@@ -176,6 +182,8 @@ namespace DesertPaintLab
             {
                 ingredient3ComboBox.Sensitive = false;
                 recordButton.Sensitive = false;
+                recordNoReactionButton.Sensitive = false;
+                recordNoReactionButton.Visible = false;
                 reactionKnown = false;
                 reactionSwatch.Clear();
                 return;
@@ -185,7 +193,8 @@ namespace DesertPaintLab
             reagents[1] = ReagentManager.GetReagent(reagentName);
             ingredient3ComboBox.Sensitive = true;
             captureButton.Sensitive = true;
-            
+            recordNoReactionButton.Sensitive = true;
+
             reaction1 = profile.FindReaction(reagents[0], reagents[1]);
             
             // TODO: really should handle reagent0==reagent1 better
@@ -194,10 +203,14 @@ namespace DesertPaintLab
                 clearReactionButton.Sensitive = recordEnabled;
                 clearReactionButton.Visible = true;
                 ingredient3ComboBox.Sensitive = true;
+                recordNoReactionButton.Sensitive = false;
+                recordNoReactionButton.Visible = false;
                 if ((reagentName = GetSelectedReagentName(3)) != null)
                 {
                     clearReactionButton.Sensitive = false;
                     clearReactionButton.Visible = false;
+                    recordNoReactionButton.Sensitive = false;
+                    recordNoReactionButton.Visible = false;
                     recipe.AddReagent(reagentName);
                     reagents[2] = ReagentManager.GetReagent(reagentName);
             
@@ -248,8 +261,10 @@ namespace DesertPaintLab
             {
                 reactionKnown = false;
                 ingredient3ComboBox.Sensitive = false;
+                recordNoReactionButton.Sensitive = recordEnabled;
+                recordNoReactionButton.Visible = true;
             }
-        
+
             expectedColor.Set(recipe.BaseColor);
             unmodifiedSwatch.Color = expectedColor;
             //SetExpectedColor(recipeColor.Red, recipeColor.Green, recipeColor.Blue);
@@ -272,9 +287,11 @@ namespace DesertPaintLab
             ingredient2ComboBox.Sensitive = false;
             ingredient3ComboBox.Sensitive = false;
             clearReactionButton.Sensitive = false;
+            recordNoReactionButton.Sensitive = false;
 
             progressBar.Show();
             recordButton.Hide();
+            recordNoReactionButton.Hide();
 
             bool enableDebugMenu;
             AppSettings.Get("EnableDebugMenu", out enableDebugMenu, false);
@@ -428,10 +445,12 @@ namespace DesertPaintLab
                     md.Destroy();
                     // reaction clipped - don't let them record
                     recordButton.Sensitive = false;
+                    recordNoReactionButton.Sensitive = false;
                 }
                 else
                 {
                     recordButton.Sensitive = recordEnabled;
+                    recordNoReactionButton.Sensitive = false;
                 }
             }
             else
@@ -558,7 +577,20 @@ namespace DesertPaintLab
                 recordButton.Sensitive = false;
             }
         }
-        
+
+        protected virtual void OnRecordNoReaction(object sender, System.EventArgs e)
+        {
+            if (ReactionRecorder.Instance.RecordReaction(profile, expectedColor, expectedColor, reagents))
+            {
+                recordNoReactionButton.Sensitive = false;
+                recordNoReactionButton.Visible = false;
+                clearReactionButton.Sensitive = true;
+                clearReactionButton.Visible = true;
+                this.reactionSwatch.Color = expectedColor;
+                this.reactedColor.Set(expectedColor);
+            }
+        }
+
         protected virtual void OnChangedIngredient1(object sender, System.EventArgs e)
         {
             UpdateIngredients();
@@ -600,6 +632,12 @@ namespace DesertPaintLab
                     {
                         // really delete it
                         profile.ClearReaction(reagent1, reagent2);
+                        reactionSwatch.Clear();
+                        reactedColor.Clear();
+                        clearReactionButton.Sensitive = false;
+                        clearReactionButton.Visible = false;
+                        recordNoReactionButton.Sensitive = true;
+                        recordNoReactionButton.Visible = true;
                     }
                     md.Destroy();
                 }
diff --git a/gtk-gui/DesertPaintLab.CaptureView.cs b/gtk-gui/DesertPaintLab.CaptureView.cs
--- a/gtk-gui/DesertPaintLab.CaptureView.cs
+++ b/gtk-gui/DesertPaintLab.CaptureView.cs
@@ -57,6 +57,8 @@ namespace DesertPaintLab
 		private global::DesertPaintLab.PaintSwatch reactionSwatch;
 		
 		private global::Gtk.Button recordButton;
+
+        private global::Gtk.Button recordNoReactionButton;
 		
 		private global::Gtk.Label reactionLabel;
 
@@ -157,8 +159,8 @@ namespace DesertPaintLab
 			w9.Position = 2;
 			w9.Expand = false;
 			w9.Fill = false;
-			// Container child vbox2.Gtk.Box+BoxChild
-			this.clearReactionButton = new global::Gtk.Button ();
+            // Container child vbox2.Gtk.Box+BoxChild
+            this.clearReactionButton = new global::Gtk.Button ();
 			this.clearReactionButton.Sensitive = false;
 			this.clearReactionButton.CanFocus = true;
 			this.clearReactionButton.Name = "clearReactionButton";
@@ -171,7 +173,19 @@ namespace DesertPaintLab
 			w10.Expand = false;
 			w10.Fill = false;
 			w10.Padding = ((uint)(6));
-			this.GtkAlignment.Add (this.vbox2);
+            this.recordNoReactionButton = new global::Gtk.Button();
+            this.recordNoReactionButton.CanFocus = true;
+            this.recordNoReactionButton.Name = "recordNoReactionButton";
+            this.recordNoReactionButton.UseUnderline = true;
+            this.recordNoReactionButton.Label = "No Reaction";
+            this.vbox2.Add(this.recordNoReactionButton);
+            global::Gtk.Box.BoxChild w21 = ((global::Gtk.Box.BoxChild)(this.vbox2[this.recordNoReactionButton]));
+            w21.PackType = ((global::Gtk.PackType)(1));
+            w21.Position = 4;
+            w21.Expand = false;
+            w21.Fill = false;
+            w21.Padding = ((uint)(6));
+            this.GtkAlignment.Add (this.vbox2);
 			this.selectIngredientsFrame.Add (this.GtkAlignment);
 			this.selectIngredientsLabel = new global::Gtk.Label ();
 			this.selectIngredientsLabel.Name = "selectIngredientsLabel";
@@ -288,7 +302,7 @@ namespace DesertPaintLab
 			w20.Position = 2;
 			w20.Expand = false;
 			w20.Fill = false;
-			this.GtkAlignment2.Add (this.vbox4);
+            this.GtkAlignment2.Add (this.vbox4);
 			this.reactedColorFrame.Add (this.GtkAlignment2);
 			this.reactionLabel = new global::Gtk.Label ();
 			this.reactionLabel.Name = "reactionLabel";
@@ -315,6 +329,7 @@ namespace DesertPaintLab
 			this.captureButton.Clicked += new global::System.EventHandler (this.OnCapture);
             this.captureFromFileButton.Clicked += new global::System.EventHandler(this.OnCaptureFromFile);
             this.recordButton.Clicked += new global::System.EventHandler (this.OnRecord);
-		}
-	}
+            this.recordNoReactionButton.Clicked += new global::System.EventHandler(this.OnRecordNoReaction);
+        }
+    }
 }