A study on the printability properties of alkali-sized recycled papers
Source abstract
Abstract
Abstract Recycled handsheets were prepared from old newspapers and old office papers with internal sizing applications of alkyl ketene dimer (AKD) emulsion at 0.5%, 1.0% and 1.5% addition levels as received basis. Handsheets made at 80 g/m 2 were air dried and oven dried as placed in drying rings followed by conditioning prior to testing. The contact angle, surface energy and drop volume changes of handsheets were carefully measured as well as used some offset printing applications. Freeness levels of pulp from newspapers and office papers were measured to be 65 and 45 SR°, respectively. It was confirmed that AKD sizing improved paper resistance against water and printing ink, and this was further improved with oven drying. Contact angle values obtained from oven-dried office papers and newspapers were in the range of 105°–95° and 85°–75°, respectively. Without drying, lowest contact angles from newspapers and office papers were recorded to be around 72° and 37°, respectively. Results were in agreement with surface energy values of samples which were around 60 mJ/m 2 for air-dried samples and over 30 mJ/m 2 for oven-dried handsheets. It was concluded that sizing actually improves print quality but may also increase colour change differences over time as represented by Δ E .
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Material Properties and Processing · Advanced Cellulose Research Studies · Dyeing and Modifying Textile Fibers
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Printing Technologies, School of Applied Science, Marmara University, Goztepe Campus, 34722 Goztepe, Istanbul, Turkey
References (30)
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