diff --git a/gprMax/input_cmds_multiuse.py b/gprMax/input_cmds_multiuse.py
index f0fcd0f3..d454c7b6 100644
--- a/gprMax/input_cmds_multiuse.py
+++ b/gprMax/input_cmds_multiuse.py
@@ -528,7 +528,7 @@ def process_multicmds(multicmds, G):
                 raise CmdInputError("'" + cmdname + ': ' + ' '.join(tmp) + "'" + ' material(s) {} do not exist'.format(notfound))
 
             for material in materials:
-                material.type = 'user-defined, debye'
+                material.type = 'debye'
                 material.poles = poles
                 material.averagable = False
                 for pole in range(1, 2 * poles, 2):
@@ -563,7 +563,7 @@ def process_multicmds(multicmds, G):
                 raise CmdInputError("'" + cmdname + ': ' + ' '.join(tmp) + "'" + ' material(s) {} do not exist'.format(notfound))
 
             for material in materials:
-                material.type = 'user-defined, lorentz'
+                material.type = 'lorentz'
                 material.poles = poles
                 material.averagable = False
                 for pole in range(1, 3 * poles, 3):
@@ -599,7 +599,7 @@ def process_multicmds(multicmds, G):
                 raise CmdInputError("'" + cmdname + ': ' + ' '.join(tmp) + "'" + ' material(s) {} do not exist'.format(notfound))
 
             for material in materials:
-                material.type = 'user-defined, drude'
+                material.type = 'drude'
                 material.poles = poles
                 material.averagable = False
                 for pole in range(1, 2 * poles, 2):
diff --git a/gprMax/materials.py b/gprMax/materials.py
index 8e0d1a45..51bb157c 100644
--- a/gprMax/materials.py
+++ b/gprMax/materials.py
@@ -48,7 +48,7 @@ class Material(object):
 
         self.numID = numID
         self.ID = ID
-        self.type = 'user-defined'
+        self.type = ''
         # Default material averaging
         self.averagable = True
 
@@ -152,9 +152,9 @@ def process_materials(G):
     if G.messages:
         print('\nMaterials:')
         if Material.maxpoles == 0:
-            materialsdata = [['\nID', '\nName', '\neps_r', 'sigma\n[S/m]', '\nmu_r', 'sigma*\n[S/m]', 'Dielectric\nsmoothable', '\nType']]
+            materialsdata = [['\nID', '\nName', '\nType', '\neps_r', 'sigma\n[S/m]', '\nmu_r', 'sigma*\n[S/m]', 'Dielectric\nsmoothable']]
         else:
-            materialsdata = [['\nID', '\nName', '\neps_r', 'sigma\n[S/m]', '\nDelta eps_r', 'tau\n[s]', '\nmu_r', 'sigma*\n[S/m]', 'Dielectric\nsmoothable', '\nType']]
+            materialsdata = [['\nID', '\nName', '\nType', '\neps_r', 'sigma\n[S/m]', '\nDelta eps_r', 'tau\n[s]', 'omega\n[Hz]', 'delta\n[Hz]', 'gamma\n[Hz]', '\nmu_r', 'sigma*\n[S/m]', 'Dielectric\nsmoothable']]
 
     for material in G.materials:
         # Calculate update coefficients for material
@@ -176,20 +176,38 @@ def process_materials(G):
             materialtext = []
             materialtext.append(str(material.numID))
             materialtext.append(material.ID)
+            materialtext.append(material.type)
             materialtext.append('{:g}'.format(material.er))
             materialtext.append('{:g}'.format(material.se))
             if Material.maxpoles > 0:
-                if material.deltaer and material.tau:
+                if 'debye' in material.type:
                     materialtext.append(', '.join('{:g}'.format(deltaer) for deltaer in material.deltaer))
                     materialtext.append(', '.join('{:g}'.format(tau) for tau in material.tau))
+                    materialtext.append('')
+                    materialtext.append('')
+                    materialtext.append('')
+                elif 'lorentz' in material.type:
+                    materialtext.append(', '.join('{:g}'.format(deltaer) for deltaer in material.deltaer))
+                    materialtext.append('')
+                    materialtext.append(', '.join('{:g}'.format(tau) for tau in material.tau))
+                    materialtext.append(', '.join('{:g}'.format(alpha) for alpha in material.alpha))
+                    materialtext.append('')
+                elif 'drude' in material.type:
+                    materialtext.append('')
+                    materialtext.append('')
+                    materialtext.append(', '.join('{:g}'.format(tau) for tau in material.tau))
+                    materialtext.append('')
+                    materialtext.append(', '.join('{:g}'.format(alpha) for tau in material.alpha))
                 else:
                     materialtext.append('')
                     materialtext.append('')
+                    materialtext.append('')
+                    materialtext.append('')
+                    materialtext.append('')
 
             materialtext.append('{:g}'.format(material.mr))
             materialtext.append('{:g}'.format(material.sm))
             materialtext.append(material.averagable)
-            materialtext.append(material.type)
             materialsdata.append(materialtext)
 
     if G.messages: