Surface and optical properties of calcium carbonate paper

The article investigates the surface and optical properties of calcium carbonate paper obtained at the UzbekChinese enterprise Fergana stone paper company (Uzbekistan), in order to identify the possibility of their use at printing enterprises for printing multicolor products using traditional printing methods. According to the results of a quantitative assessment of the surface quality by the indirect Beck method, we can say that paper sample 1 has a smoothness like coated paper (750–1500 s), paper samples 2 and 3 – like calendered paper, so that these paper samples can be recommended for prints with increased quality requirements. Smaller values of roughness Ra and small depressions, expressed by darkening in the topographic AFM images, characterized sufficient homogeneity and density of the structure. It was also revealed that the surface of the paper samples has a high ability to specularly reflect the incident light, since the percentage of surface reflection is similar to that of coated papers. Samples of paper have a whiteness of about 90 % and do not have a tint, since the difference between the maximum and minimum values of the reflection coefficients on a white stack is not more than 10 %. The tested paper samples can be recommended without restrictions for double-sided printing, since the opacity index is more than 92 %.

Industrial Waste Water Recycling Using Nanographene Oxide Filters

Nanomaterials play a vital role in healthcare, electronics, manufacturing industries, biotechnology, and security systems. One such material is graphene and its oxides are specifically used for recycling industrial waste water. Graphene, a single layer in honeycomb cross section, provides excellent attention because of its significant optical, mechanical, and physical properties. GO was utilized to decrease the acidic or essential centralization of the mechanical wastewater into reusable water for the modern reason utilizing graphene channels. In this paper, sample solution (waste water) is taken from paper industry. Graphene channels can be created from the pencil graphite. Graphene has the high goals of separating capacity, and graphene is considered as “a definitive RO film” in light of its stronger, thinner, and more chemically safe nature than the polymer layers. Graphene oxide layers are likewise to be used in the desalination plant in place of the RO membrane.

Quaternary Alloy Quantum Dots as Fluorescence Probes for Total Acidity Detection of Paper-Based Relics

Traditionally, the acidity of paper-based relics was determined by an extraction method and using a pH meter. This method could not obtain the total acidity of the paper-based relics because it only detected the concentration of free protons in the aqueous soaking solution. To overcome this defect, a new method for determining the total acidity of paper-based relics has been established by using quaternary alloy quantum dots. The quantum dots, CdZnSeS, modified by p-Aminothiophenol (pATP) were prepared, and their composition and structure were characterized. The fluorescence behavior of prepared quantum dots with acidity was investigated. The following results were obtained. The fluorescence of CdZnSeS-pATP quantum dots could decrease with increases in acidity because pATP dissociated from the surfaces of the quantum dots due to protons or undissociated weak acids. Based on this feature, a method for determining the acidity of paper-based relics was constructed, and this method was used to evaluate the acidity of actual paper-based relics. Obviously, for a given paper sample, since both free protons and bound protons can be determined by this method, the acidity measured by this method is more reasonable than that by pH meter.

Evaluation of Deinking Performance of Active Calcium Silicate Filled Paper

The deinking effect of printing paper filled with CaSiO3 and CaSiO3/French chalk was investigated. As a result, it shows that the two kinds of paper samples have better deinking effect, and the whiteness of the former is slightly higher than that of the latter. However, the strength index of the former is slightly lower than that of the latter. The adhesive removal effect of the paper sample filled with CaSiO3 is better than that of the paper filled with CaSiO3/ French chalk powder.

Photograph Paper Sample Books : A Reference Collection and Web Presentation At George Eastman House

This thesis proposes a model for the cataloging, evaluation, and description of photographic paper sample books in the George Eastman House collection. The model is implemented as a reference resource on Notes - on Photographs, a collaborative website in development at George Eastman House with the support of a National Leadership Grant from the Institute of Museum and Library Services. Notes - on Photographs is built on a wiki platform, which is characterized by capabilities for dynamic updating and collaborative editing by a group of users. The model implemented to describe the contents of the paper sample books utilizes these capabilities to further enrich the information resource. Manufacturer paper sample books are invaluable resources in developing a better understanding of the materials of photography; they reveal the evolution of the dominant image-making support for over a century of silver halide photography. This project seeks to do a better job of explaining what they are, why they are valuable, and of promoting a standardized language to facilitate description and communication among professionals engaged in the care, display, and study of photographs. The ability to articulate the technological and material aspects of any medium contributes to better discernment and has implications for establishing authenticity, being conscious of an image maker's aesthetic decisions, dating works, and for understanding the condition and preservation of the object. In most cases photographic paper sample books in the George Eastman House collection are undated, and catalogue records treat the books as single entries rather than complex bound material where each sample has unique characteristics. The work accomplished in this thesis will inform and enrich the object information in the current cataloging system, The Museum System (TMS) at George Eastman House.

Photograph Paper Sample Books : A Reference Collection and Web Presentation At George Eastman House

This thesis proposes a model for the cataloging, evaluation, and description of photographic paper sample books in the George Eastman House collection. The model is implemented as a reference resource on Notes - on Photographs, a collaborative website in development at George Eastman House with the support of a National Leadership Grant from the Institute of Museum and Library Services. Notes - on Photographs is built on a wiki platform, which is characterized by capabilities for dynamic updating and collaborative editing by a group of users. The model implemented to describe the contents of the paper sample books utilizes these capabilities to further enrich the information resource. Manufacturer paper sample books are invaluable resources in developing a better understanding of the materials of photography; they reveal the evolution of the dominant image-making support for over a century of silver halide photography. This project seeks to do a better job of explaining what they are, why they are valuable, and of promoting a standardized language to facilitate description and communication among professionals engaged in the care, display, and study of photographs. The ability to articulate the technological and material aspects of any medium contributes to better discernment and has implications for establishing authenticity, being conscious of an image maker's aesthetic decisions, dating works, and for understanding the condition and preservation of the object. In most cases photographic paper sample books in the George Eastman House collection are undated, and catalogue records treat the books as single entries rather than complex bound material where each sample has unique characteristics. The work accomplished in this thesis will inform and enrich the object information in the current cataloging system, The Museum System (TMS) at George Eastman House.