Optical and Printing Properties of Deinked Office Waste Printed Paper

Document Type : Original Article

Authors

1 Department of Printing Science and Technology, Institute for Color Science and Technology, P.O. Box: 16765-654, Tehran. Iran

2 Department of Environmental Research, Institute for Color Science and Technology, P.O. Box: 16765-654, Tehran, Iran

3 Wood and Forest Product Division, Research Institute of Forest and Rangeland, Agricultural Research Education and Extension Organization (AREEO), P.O. Box: 315851343, Tehran, Iran

Abstract

Deinking waste paper is done in various ways, and research on newer methods is also being done. Traditional deinking methods to remove ink from waste printing papers have a relatively high efficiency compared to contact methods, but in non-contact printing such as electrophotographic printing (LaserJet printers and photocopiers) due to Mixing of the ink with the paper texture during the stabilization of the ink with the help of high heat, the traditional deinking methods are less efficient and it is necessary to use newer methods. In this research, enzymatic deinking of office waste paper was done by a commercial cellulase enzyme in a neutral environment. 15 tests were conducted, and optical and printing properties including the paper were investigated. By measuring the reflection before and after printing and measuring the print density after printing, it was determined that the printability of deinked paper is within the desired range. Eric's number was 128 ppm for sample number 8 and 138 ppm for sample number 12, which has decreased compared to the control sample with an Eric number of 571 ppm. Measuring the reflection before and after printing and measuring the print density after printing, show that the printability of decomposed ink paper is in the desired range.

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References

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