Abstract
The cleaning of particles from smooth and rough paper surfaces using a high-speed CO2 snow jet was investigated. The measurements included characterization of the jet properties, determination of the cleaning efficiency, and evaluation of any possible adverse effects. The method was compared with nitrogen jet cleaning and dry cleaning by commercial materials. The results showed that the CO2 snow jet is able to effectively remove particles from the paper surface and did not cause any observable degradation. The CO2 snow jet cleaning compared with the mechanical dry cleaning showed similar effectiveness without any adverse effects on the paper surface. It was proved that the CO2 snow technique is a suitable method for cleaning common types of paper materials.
Highlights
Particles suspended in the indoor air cause adverse effects on library and archival collections
The CO2 snow jet was partially focused with increasing nitrogen flow producing narrower cone spray (Fig. 5a, b), whereas the influence of the CO2 flow rate was negligible (Fig. 5c, d)
The results revealed that the local impaction pressure increased with both the volume flow rate of the coaxial nitrogen and the mass flow rate of carbon dioxide (Fig. 6) and that the C O2 snow jet caused a rapid decrease of the surface temperature (10–20 °C/s) of the cleaned material
Summary
Particles suspended in the indoor air cause adverse effects on library and archival collections. Typical indoor sources in libraries and archives are related to activities conducted indoors (such as maintenance or cleaning) and in rooms accessible to public and visitors (skin and clothing abrasion, mineral particles brought on shoes) [1,2,3,4,5]. These processes are the principal sources of coarse particles (˃ 1 μm) composed mainly of organic and mineral matter. Due to the small size, they infiltrate from ambient air most and once indoors they deposit onto
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
