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Here , a magnetic filament consisting of polylactic acid ( PLA ) polymer and 40 wt. % iron was used to print a variety of samples to investigate how the macroscopic sample shape and the mesoscopic infill orientation and infill percentage affects the magnetic properties .
 filament, polylactic acid, PLA, polymer, iron, print, samples, macroscopic, infill, infill percentage, properties
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 filament, polylactic acid, PLA, polymer, iron, print, samples, macroscopic, infill, infill percentage, properties