Comparison of black and white and colour laser printers’ emitted fine particles’ number and mass concentration

Research output: Contribution to conferenceAbstractpeer-review


The main objective of this study was to compare emitted number and mass of fine particles (pt) from black and
white (b/w) and colour laser printers during the printing process and one hour afterwards.
Materials and Methods
Air samples were taken with the particle size spectrometer for real-time ELPI+, Dekati (air flow rate 10 l/min).
Day before each test surfaces of the testing room were cleaned. Measurements were taken ~ 0.5 m from the
printers: one hour before the test, during printing and one hour after the printing (observing the one-hour
break before starting last measurement). There were two types of tests performed on each printer: a 10-page
and a 100-page test (with 1 minute pause). The test was completed when 1200 pages were reached or 90 minutes
had elapsed. A total of 460-470 pages were printed during the 10-page test, and 1100-1200 pages were printed
during the 100-page test using StoraEnso Multicopy 80g/m3 paper for all tests.
During the 10-page test 13630 pt/cm3 fine particles for the b/w printer and 19943 pt/cm3
for colour printer were
determined. 100-page test produced 9294 pt/cm3
from b/w and 8324 pt/cm3
from colour printer. One hour after
the printing b/w printer emitted 117071 pt/cm3
in 10-page test and 152351 pt/cm3
in 100-page test. Colour printer
10-page after test produced 54722 pt/cm3
and 122985 pt/cm3
after 100-page test. Detected particle mass was
insignificant: in range of 0.005 to 0.006 mg/m³ for b/w printer and 0.014 to 0.019 mg/m³ for colour printer.
The highest number of particles was observed one hour after the end of the printing for both tested printers.
Particle mass in mg/m³ was detected in the size range 6nm - 2.5 μm (no particles were detected at range 2.5 to
10μm), the larger mass results presented colour printers.
Original languageEnglish
Publication statusPublished - 24 Mar 2021
EventRSU Research week 2021 - Online, Rīga, Latvia
Duration: 22 Mar 202128 Mar 2021


ConferenceRSU Research week 2021
Internet address

Field of Science*

  • 2.2 Electrical engineering, Electronic engineering, Information engineering

Publication Type*

  • 3.4. Other publications in conference proceedings (including local)


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