Abstract
Objectives
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.
Results
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.
Conclusions
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.
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.
Results
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.
Conclusions
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 language | English |
|---|---|
| Pages | 127 |
| Publication status | Published - 24 Mar 2021 |
| Event | RSU Research week 2021 - Online, Rīga, Latvia Duration: 22 Mar 2021 → 28 Mar 2021 https://rw2021.rsu.lv/general-information https://liverw.rsu.lv/posters/peculiarities-of-biomechanical-behavior-of-human-varicose-veins |
Conference
| Conference | RSU Research week 2021 |
|---|---|
| Country/Territory | Latvia |
| City | Rīga |
| Period | 22/03/21 → 28/03/21 |
| Internet address |
Field of Science*
- 2.2 Electrical engineering, Electronic engineering, Information engineering
Publication Type*
- 3.4. Other publications in conference proceedings (including local)