{TAIL ~ The image forming apparatus} 17, wherein {HEAD ~ a fine powder} of Mohs scale of hardness being not less than 6.0 is added to the developer from outside 
{ TAIL ~ The image forming apparatus } 17 , wherein { HEAD ~ a fine powder } of Mohs scale of hardness being not less than 6.0 is added to the developer from outside
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH