A review of reflectance-based ink content determination on recycle pulps

作者：Korkko Mika^*; Haapala Antti; Ammala Ari; Niinimaki Jouko

来源：Appita Journal, 2013, 66(1): 47-53.

• Effective residual ink concentration
• ERIC
• residual ink
• RI
• deviation in determined ink content
• light scattering coefficient
• mineral fillers
• fibre fines
• test media
• sheet
• pad
• retention

Reflectance-based ink content of recycled pulps can be measured with either a constant (assumed) or measured light scattering coefficient. In addition the measurement media can be prepared in a number of ways making the different approaches difficult to understand in detail. This paper reviews recent research efforts and aims to resolve some anomalies detected in ink content measurement practises. The review covers the most common reflectance-based ink content measurement methods, the effect of fine materials and the importance of measured light scattering. The importance of these results is highlighted in practical examples showing how these variables change the observed results when monitoring recycled pulp prepared from a range of raw materials through washing and flotation processes.

• 出版日期2013-3