ISO 20318-2:2019
                            
                        
                            
                                Mechanical pencils and leads for general use -- Classification, dimensions, quality and test methods-- Part 2: Black leads
                            
                        
                        
                        
                        
                            
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                                            Vigente
                
 
        
                        
                        
                        
    
                
                        $94.010
                    
                
                
                
     
    
                        
                        
                            
                            
                            
                            
                        
                        
                        
                     
                        
                            Alcance
                            This document specifies classification, dimensions, quality and test methods for black leads used for mechanical pencils for general writing, as specified in ISO 20318-1.