Emissions Study Using Zortrax M200 and Filaments

Came across this study, released few days ago; they used an M200 and Zortrax filaments (abs, ultrat, asa, hips, petg, glass, pcabs, esd) as reference. They also tested abs across various colors and print temperatures. Information on particle sizes, voc composition, emission rates.

https://www.sciencedirect.com/science/article/pii/S0160412018323663/pdfft?md5=f939aa49af39addba40dd30a54d1bee1&pid=1-s2.0-S0160412018323663-main.pdf -  main paper

https://ars.els-cdn.com/content/image/1-s2.0-S0160412018323663-mmc1.docx -  extra data

If something is free on the sciencedirect then this means it have no any scientific value.

This paper is about something somewhere in the perfectly sealed environment but the most important I want to know the acceptable values because I can prepare same paper about my tap water which contain many 'toxic' substances.... but in so small amount that it is acceptable and not harmful. I saw many articles about 3d printers fumes which seems are cheap sensation, when company where I worked using chemicals then they have international limits of 'ppm' for safety, nobody ever mentioned in articles like a this that styrene emitted by 3d printer = xx ppm, the regulatory limit is x ppm so for me this is just populism not science.

Let's analyze this VVOC chamber air concentrations and lets take the highest value 22 ug/m3 sealed environment 1.5h for acrylonitrite


22ug = 0.022mg = 0.000022 ppm in perfectly sealed chamber but nobody printing in the sealed room of 3m3 size.


Over 1ppm is not acceptable, this means 3d printing emitted 45times less and I really have no time to analyze rest of this numbers because it will be same conclusions which somehow authors of this article should shown not me.