diff --git a/assets/uploads/vouchers/6a0f569864c5a-Screenshot_356.png b/assets/uploads/vouchers/6a0f569864c5a-Screenshot_356.png
new file mode 100644
index 00000000..9bf0941d
Binary files /dev/null and b/assets/uploads/vouchers/6a0f569864c5a-Screenshot_356.png differ
diff --git a/imprimir_etiquetas_termica.php b/imprimir_etiquetas_termica.php
index 47611fd0..6d6a497e 100644
--- a/imprimir_etiquetas_termica.php
+++ b/imprimir_etiquetas_termica.php
@@ -66,7 +66,7 @@ if (empty($codes)) {
             align-items: center;
             overflow: hidden;
             text-align: center;
-            padding: 1mm;
+            padding: 3mm 1mm 1mm 1mm; /* Aumentado padding superior de 1mm a 3mm para bajar el contenido */
             border: 0.1mm solid #eee; /* Guía visual en pantalla */
         }
 
@@ -83,20 +83,22 @@ if (empty($codes)) {
         }
 
         .barcode-container {
-            height: 9.12mm; /* Altura exacta solicitada */
+            height: 9mm; /* Reducido de 11mm a 9mm */
             display: flex;
             justify-content: center;
             align-items: center;
             margin: 1mm 0; /* Margen vertical */
-            padding: 0 2mm; /* Margen lateral de 2mm solicitado */
+            padding: 0 1mm; /* Reducido de 2mm a 1mm para maximizar grosor de barras */
             box-sizing: border-box;
             width: 100%; /* Ocupa el ancho de la etiqueta para centrar */
         }
 
         .barcode-container svg {
-            height: 9.12mm;
-            width: auto; /* Que el ancho sea proporcional a la cantidad de caracteres */
+            height: 9mm;
+            width: auto;
             shape-rendering: crispEdges;
+            display: block;
+            margin: 0 auto;
         }
 
         .sku-text {
@@ -150,9 +152,10 @@ if (empty($codes)) {
                     <div class="producto-nombre"><?php echo htmlspecialchars($name); ?></div>
                     <div class="barcode-container">
                         <?php 
-                        // widthFactor 1 + altura 70 en el SVG, escalado a 9.12mm en CSS
-                        // resulta en una barra mínima de ~0.13mm (9.12 / 70 = 0.13)
-                        echo $generator->getBarcode($code, 1, 70); 
+                        // widthFactor 1.2 + altura 72 en el SVG, escalado a 9mm en CSS
+                        // resulta en una barra mínima de ~0.15mm (9 / 72 * 1.2)
+                        // Esto reduce la densidad y mejora la lectura sin ser demasiado grueso.
+                        echo $generator->getBarcode($code, 1.2, 72); 
                         ?>
                     </div>
                     <div class="sku-text"><?php echo htmlspecialchars($code); ?></div>
diff --git a/includes/barcode_generator.php b/includes/barcode_generator.php
index 156c486c..cee34e57 100644
--- a/includes/barcode_generator.php
+++ b/includes/barcode_generator.php
@@ -11,23 +11,27 @@ class BarcodeGenerator
         $this->barcode_codes = $this->getCode128Map();
     }
 
-    public function getBarcode($code, $widthFactor = 2, $height = 50, $foregroundColor = 'black')
+    public function getBarcode($code, $widthFactor = 1, $height = 50, $foregroundColor = 'black')
     {
         $barcodeData = $this->getBarcodeData($code);
+        if (!$barcodeData) return '';
 
         $bars = '';
-        $x = 0;
+        $quietZone = 10; // 10 modules of quiet zone
+        $x = $quietZone;
 
-        // Generate SVG bars
-        foreach (str_split($barcodeData['bars']) as $bar) {
-            $width = $widthFactor * (int)$bar;
-            if ($x % 2 == 0) { // 0, 2, 4... are black bars
+        $barArray = str_split($barcodeData['bars']);
+        for ($i = 0; $i < count($barArray); $i++) {
+            $width = $widthFactor * (int)$barArray[$i];
+            if ($i % 2 == 0) { // Even indices are bars, odd are spaces
                 $bars .= '<rect x="' . $x . '" y="0" width="' . $width . '" height="' . $height . '" style="fill:' . $foregroundColor . ';" />';
             }
             $x += $width;
         }
 
-        $svg = '<svg version="1.1" xmlns="http://www.w3.org/2000/svg" width="' . $x . '" height="' . $height . '" viewBox="0 0 ' . $x . ' ' . $height . '">';
+        $totalWidth = $x + $quietZone;
+        $svg = '<svg version="1.1" xmlns="http://www.w3.org/2000/svg" width="' . $totalWidth . '" height="' . $height . '" viewBox="0 0 ' . $totalWidth . ' ' . $height . '" preserveAspectRatio="none">';
+        $svg .= '<rect width="' . $totalWidth . '" height="' . $height . '" style="fill:white;" />';
         $svg .= $bars;
         $svg .= '</svg>';
 
@@ -36,36 +40,61 @@ class BarcodeGenerator
 
     private function getBarcodeData($code)
     {
-        // For simplicity, we'll stick to Code Set B
-        $codeSet = 'B';
-        $data = '';
-        $sum = 104; // Start code B
-        $mult = 1;
-
-        foreach (str_split($code) as $char) {
-            $value = $this->getCharValue($codeSet, $char);
-            if ($value === null) {
-                // Fallback for unsupported characters, or switch sets (more complex)
-                // For now, we'll just skip them to avoid errors
-                continue;
+        $i = 0;
+        $len = strlen($code);
+        $indices = [];
+        $currentMode = 'B';
+        
+        $indices[] = 104; // Start B
+        
+        while ($i < $len) {
+            // Check for 4 or more digits to switch to Mode C
+            $digitCount = 0;
+            while ($i + $digitCount < $len && is_numeric($code[$i + $digitCount])) {
+                $digitCount++;
+            }
+            
+            if ($digitCount >= 4) {
+                if ($currentMode !== 'C') {
+                    $indices[] = 99; // Switch to C
+                    $currentMode = 'C';
+                }
+                
+                while ($digitCount >= 2) {
+                    $indices[] = (int)substr($code, $i, 2);
+                    $i += 2;
+                    $digitCount -= 2;
+                }
+            }
+            
+            if ($i < $len) {
+                if ($currentMode === 'C') {
+                    $indices[] = 100; // Switch to B
+                    $currentMode = 'B';
+                }
+                $val = $this->getCharValue('B', $code[$i]);
+                if ($val !== null) $indices[] = $val;
+                $i++;
             }
-            $data .= str_pad($value, 2, '0', STR_PAD_LEFT);
-            $sum += ($value * $mult);
-            $mult++;
         }
 
+        // Checksum calculation
+        $sum = $indices[0];
+        for ($k = 1; $k < count($indices); $k++) {
+            $sum += ($indices[$k] * $k);
+        }
         $checksum = $sum % 103;
-        $data .= str_pad($checksum, 2, '0', STR_PAD_LEFT);
+        $indices[] = $checksum;
+        $indices[] = 106; // Stop
 
-        // Start, data, checksum, stop
-        $full_code = '104' . $data . '106';
         $bars = '';
-        for ($i = 0; $i < strlen($full_code); $i += 2) {
-            $index = (int)substr($full_code, $i, 2);
-            $bars .= $this->barcode_codes['bars'][$index];
+        foreach ($indices as $index) {
+            if (isset($this->barcode_codes['bars'][$index])) {
+                $bars .= $this->barcode_codes['bars'][$index];
+            }
         }
         
-        return ['bars' => $bars, 'code' => $full_code];
+        return ['bars' => $bars];
     }
 
     private function getCharValue($set, $char)
@@ -73,7 +102,7 @@ class BarcodeGenerator
         if (isset($this->barcode_codes[$set][$char])) {
             return $this->barcode_codes[$set][$char];
         }
-        return null; // Character not in set
+        return null;
     }
 
     private function getCode128Map()
@@ -87,12 +116,25 @@ class BarcodeGenerator
                 '@' => 32, 'A' => 33, 'B' => 34, 'C' => 35, 'D' => 36, 'E' => 37, 'F' => 38, 'G' => 39,
                 'H' => 40, 'I' => 41, 'J' => 42, 'K' => 43, 'L' => 44, 'M' => 45, 'N' => 46, 'O' => 47,
                 'P' => 48, 'Q' => 49, 'R' => 50, 'S' => 51, 'T' => 52, 'U' => 53, 'V' => 54, 'W' => 55,
-                'X' => 56, 'Y' => 57, 'Z' => 58, '[' => 59, '\\' => 60, ']' => 61, '^' => 62, '_' => 63
+                'X' => 56, 'Y' => 57, 'Z' => 58, '[' => 59, '\\' => 60, ']' => 61, '^' => 62, '_' => 63,
+                '`' => 64, 'a' => 65, 'b' => 66, 'c' => 67, 'd' => 68, 'e' => 69, 'f' => 70, 'g' => 71,
+                'h' => 72, 'i' => 73, 'j' => 74, 'k' => 75, 'l' => 76, 'm' => 77, 'n' => 78, 'o' => 79,
+                'p' => 80, 'q' => 81, 'r' => 82, 's' => 83, 't' => 84, 'u' => 85, 'v' => 86, 'w' => 87,
+                'x' => 88, 'y' => 89, 'z' => 90, '{' => 91, '|' => 92, '}' => 93, '~' => 94
             ],
             'bars' => [
-                '212222', '222122', '222221', '121223', '121322', '131222', '122213', '122312', '132212', '221213', '221312', '231212', '112232', '122132', '122231', '113222', '123122', '123221', '223211', '221132', '221231', '213212', '223112', '312131', '311222', '321122', '321221', '312212', '322112', '322211', '212123', '212321', '232121', '111323', '131123', '131321', '112313', '132113', '132311', '211313', '231113', '231311', '112133', '112331', '132131', '113123', '113321', '133121', '313121', '211331', '231131', '213113', '213311', '213131', '311123', '311321', '331121', '312113', '312311', '332111', '314111', '221411', '413111', '111224', '111421', '121124', '121421', '141122', '141221', '112214', '112412', '122114', '122411', '142112', '142211', '241211', '221114', '411122', '411221', '421121', '421211', '212141', '214121', '412121', '111143', '111341', '131141', '114113', '114311', '411113', '411311', '113141', '114131', '311141', '411131', '211412', '211214', '211232', '2331112'
+                '212222', '222122', '222221', '121223', '121322', '131222', '122213', '122312', '132212', '221213', // 0-9
+                '221312', '231212', '112232', '122132', '122231', '113222', '123122', '123221', '223211', '221132', // 10-19
+                '221231', '213212', '223112', '312131', '311222', '321122', '321221', '312212', '322112', '322211', // 20-29
+                '212123', '212321', '232121', '111323', '131123', '131321', '112313', '132113', '132311', '211313', // 30-39
+                '231113', '231311', '112133', '112331', '132131', '113123', '113321', '133121', '313121', '211331', // 40-49
+                '231131', '213113', '213311', '213131', '311123', '311321', '331121', '312113', '312311', '332111', // 50-59
+                '314111', '221411', '413111', '111224', '111421', '121124', '121421', '141122', '141221', '112214', // 60-69
+                '112412', '122114', '122411', '142112', '142211', '241211', '221114', '411122', '411221', '421121', // 70-79
+                '421211', '212141', '214121', '412121', '111143', '111341', '131141', '114113', '114311', '411113', // 80-89
+                '411311', '113141', '114131', '311141', '411131', '232131', '233131', '132131', '113131', '311131', // 90-99
+                '311311', '331131', '313111', '211412', '211214', '211232', '2331112' // 100-106
             ]
         ];
     }
 }
-?>
\ No newline at end of file
diff --git a/test_etiquetas.php b/test_etiquetas.php
index 6baed7fc..a833bac4 100644
--- a/test_etiquetas.php
+++ b/test_etiquetas.php
@@ -61,7 +61,7 @@ $generator = new BarcodeGenerator();
             align-items: center;
             overflow: hidden;
             text-align: center;
-            padding: 1mm;
+            padding: 3mm 1mm 1mm 1mm; /* Aumentado padding superior de 1mm a 3mm para bajar el contenido */
         }
 
         .producto-nombre {
@@ -77,20 +77,22 @@ $generator = new BarcodeGenerator();
         }
 
         .barcode-container {
-            height: 9.12mm; /* Altura solicitada: 9.12mm */
+            height: 9mm; /* Reducido de 11mm a 9mm */
             display: flex;
             justify-content: center;
             align-items: center;
             margin: 1mm 0;
-            padding: 0 2mm; /* Margen de 2mm solicitado */
+            padding: 0 1mm; /* Reducido de 2mm a 1mm para maximizar grosor de barras */
             box-sizing: border-box;
             width: 100%;
         }
 
         .barcode-container svg {
-            height: 9.12mm;
+            height: 9mm;
             width: auto;
             shape-rendering: crispEdges;
+            display: block;
+            margin: 0 auto;
         }
 
         .sku-text {
@@ -126,7 +128,7 @@ $generator = new BarcodeGenerator();
 </head>
 <body>
 
-    <button class="no-print" onclick="window.print()">IMPRIMIR PRUEBA (9.12mm alto)</button>
+    <button class="no-print" onclick="window.print()">IMPRIMIR PRUEBA (9mm alto)</button>
 
     <div class="etiquetas-container">
         <?php 
@@ -138,9 +140,10 @@ $generator = new BarcodeGenerator();
                 <div class="producto-nombre">PRODUCTO <?php echo $sku; ?></div>
                 <div class="barcode-container">
                     <?php 
-                    // widthFactor 1 + altura 70 en el SVG, escalado a 9.12mm en CSS
-                    // resulta en una barra mínima de ~0.13mm (9.12 / 70 = 0.13)
-                    echo $generator->getBarcode($sku, 1, 70); 
+                    // widthFactor 1.2 + altura 72 en el SVG, escalado a 9mm en CSS
+                    // resulta en una barra mínima de ~0.15mm (9 / 72 * 1.2)
+                    // Esto reduce la densidad y mejora la lectura sin ser demasiado grueso.
+                    echo $generator->getBarcode($sku, 1.2, 72); 
                     ?>
                 </div>
                 <div class="sku-text"><?php echo $sku; ?></div>
@@ -151,11 +154,12 @@ $generator = new BarcodeGenerator();
     <div class="no-print" style="max-width: 500px; background: white; padding: 15px; border-radius: 8px; margin-top: 20px; font-size: 13px; line-height: 1.4; border: 1px solid #ddd;">
         <p style="margin-top: 0;"><strong>✅ Especificaciones Aplicadas:</strong></p>
         <ul style="text-align: left; padding-left: 20px;">
-            <li><b>Tipo:</b> CODE 128</li>
-            <li><b>Altura:</b> 9.12 mm</li>
-            <li><b>Ancho:</b> ~24 mm</li>
-            <li><b>Margen lateral:</b> 2 mm</li>
-            <li><b>Ancho barra mínima:</b> 1 dot (~0.13mm)</li>
+            <li><b>Tipo:</b> CODE 128 (Optimizado con Modo C para números)</li>
+            <li><b>Altura:</b> 9 mm</li>
+            <li><b>Posición:</b> Centrado vertical (Padding superior 3mm)</li>
+            <li><b>Margen lateral:</b> 1 mm</li>
+            <li><b>Ancho barra mínima:</b> ~0.15mm (Optimizado para escaneo)</li>
+            <li><b>Densidad:</b> Reducida (menos barras al agrupar números)</li>
         </ul>
     </div>