diff --git a/displayprinter.asp b/displayprinter.asp
index 6cad6b2..f726583 100644
--- a/displayprinter.asp
+++ b/displayprinter.asp
@@ -280,26 +280,53 @@ Else
 
                 ' Try to convert to numeric
                 On Error Resume Next
-                Dim numericValue, progressClass
+                Dim numericValue, progressClass, displayValue, isWaste
                 numericValue = CDbl(itemValue)
                 If Err.Number = 0 Then
-                    ' Determine progress bar color based on level
-                    If numericValue < 10 Then
-                        progressClass = "bg-danger"      ' Red for critical (< 10%)
-                    ElseIf numericValue < 25 Then
-                        progressClass = "bg-warning"     ' Yellow for low (< 25%)
+                    ' Check if this is a waste cartridge (invert the logic)
+                    isWaste = (InStr(1, itemName, "Waste", 1) > 0)
+
+                    If isWaste Then
+                        ' For waste cartridges: 0 = OK (100% capacity), 1 = Replace (0% capacity)
+                        ' If binary (0 or 1), convert to percentage first
+                        If numericValue <= 1 Then
+                            ' Binary value: 0 or 1
+                            displayValue = 100 - (numericValue * 100)
+                        Else
+                            ' Percentage value: invert it
+                            displayValue = 100 - numericValue
+                        End If
+
+                        ' Color logic for waste capacity
+                        If displayValue < 10 Then
+                            progressClass = "bg-danger"      ' Red for critical (< 10% capacity remaining)
+                        ElseIf displayValue < 25 Then
+                            progressClass = "bg-warning"     ' Yellow for low (< 25% capacity remaining)
+                        Else
+                            progressClass = "bg-success"     ' Green for good (>= 25% capacity remaining)
+                        End If
                     Else
-                        progressClass = "bg-success"     ' Green for good (>= 25%)
+                        ' Normal supplies: show value as-is
+                        displayValue = numericValue
+
+                        ' Normal color logic
+                        If numericValue < 10 Then
+                            progressClass = "bg-danger"      ' Red for critical (< 10%)
+                        ElseIf numericValue < 25 Then
+                            progressClass = "bg-warning"     ' Yellow for low (< 25%)
+                        Else
+                            progressClass = "bg-success"     ' Green for good (>= 25%)
+                        End If
                     End If
 
                     ' Display supply level with progress bar
                     Response.Write("<div class='mb-3'>")
                     Response.Write("<div class='d-flex justify-content-between mb-1'>")
                     Response.Write("<span><strong>" & Server.HTMLEncode(itemName) & "</strong></span>")
-                    Response.Write("<span>" & Round(numericValue, 1) & "%</span>")
+                    Response.Write("<span>" & Round(displayValue, 1) & "%</span>")
                     Response.Write("</div>")
                     Response.Write("<div class='progress' style='height: 25px;'>")
-                    Response.Write("<div class='progress-bar " & progressClass & "' role='progressbar' style='width: " & numericValue & "%;' aria-valuenow='" & numericValue & "' aria-valuemin='0' aria-valuemax='100'>" & Round(numericValue, 1) & "%</div>")
+                    Response.Write("<div class='progress-bar " & progressClass & "' role='progressbar' style='width: " & displayValue & "%;' aria-valuenow='" & displayValue & "' aria-valuemin='0' aria-valuemax='100'>" & Round(displayValue, 1) & "%</div>")
                     Response.Write("</div>")
                     Response.Write("</div>")