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The digital printing process contributes to the quality of indoor air through the emission of chemical stressors such as total volatile organic compounds (TVOCs) and suspended particulate matter (SPM). The concentration levels of SPM and TVOCs were determined using the gravimetric and gas chromatography method, respectively. The results show that the digital printing machines and the cutting machine do not produce PM 2.5  particles. The significant cumulative mass concentrations of PM 10  suspended particles of 9.91 μg/m 3  for a single-colour digital printing machine, 4.45 μg/m 3  for a four-colour digital printing machine, and 2.02 μg/m 3  for a cutting machine, were detected. By comparing the cumulative values of TVOC concentration levels measured, it can be concluded that the values have been 4 to 12 times higher for the four-colour digital printing machine than for the single-colour digital printing machine. Namely, the TVOC concentration levels measured for the four-colour digital printing machine ranged from 28.69 to 57.30 mg/m 3 , while the values for the single-colour digital printing machine ranged from 2.31 to 13.51 mg/m 3 . Considering the fact that there are no standards of quality of indoor air in printing offices defined in the Republic of Serbia, the results obtained could represent a valid basis and a worthy guideline for the definition of values necessary for the indoor air quality assessment.

Potential Chemical Stressors Emitted During the Operation of Machines in the Digital Printing Process