Natural printing papers

Wood-free, machine-finished natural printing papers with basis weights of s 80 g m (Group 1), 81-149 g m (Group 2) and a 150 g m (Group 3). 

Wood-free, supercalendered natural printing papers with basis weights as described for machine-finished papers. 

The mass spectrum may be either in analog form (chart paper) or digital form (printed paper). Analyses are calculated to give mole %, weight %, or volume %. Either individual components, compound types by carbon number, or total compound type are reported. This is determined by the nature of the sample and the requirements of the submitter. 

Kabalnov described water-based inkjet ink compositions that are miniemulsions, i.e., an aqueous vehicle having emulsified oil particles with dissolved dye molecules, where the oil droplets have a diameter of less than 1 m. In his patent, Kabalnov mentioned the advantages of miniemulsions in comparison to microemulsions, namely the surfactant nature and concentration which allow better penetration control to the printed papers, and the dye load in miniemulsions can also be increased compared to microemulsions at acceptable viscosity limits. According to this invention, the aqueous inkjet ink composition is comprised of an oil-soluble dye, a solvent, and an aqueous vehicle wherein particles of the oil-soluble dye are dissolved in low-polarity oil particles having a particle size of less than 1 m, the particles forming miniemulsions in water. 

In the printed paper Dalton has reached the conclusion that the volume of any gas absorbed by one volume of air-free water, which does not combine chemically with the water (i.e. can be completely expelled from solution by reducing the pressure), is a fraction which is a reciprocal of the cube of a natural number, the volume of gas being measured at the temperature and pressure of the experiment ... 

Diffuse reflection spectroscopy, also known as diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy, enables the analysis of many samples for which traditional techniques fail, to be made with little or no sample preparation. Many substances in their natural. state. e.spe-cially powders but also any solid with a rough surface, such as dyed textiles and printed papers, exhibit diffuse reflection, i.e., incident light is... 

Gravure papers (SC-A. SC-A+) have the same properties as natural magazine paper, they are specially suited to gravure printing. ISO brightness is > 67%. 

Improved newsprint (SC-B, SC-C), improved for gravure printing containing up to 25-30% recycled pulp has the same properties as natural magazine paper ISO brightness is < 67%. 

Fluidyibsorbamy. Fluids like ink penetrate into paper during the printing process. The further the ink penetrates, the less glossy the print. The degree of penetration in paper is generally a function of the paper porosity and wettabiUty by the fluid. It can be controlled by the particle size, shape, and chemical nature of the filler or filler surface. In particular, plate-like fillers, such as clays, tend to produce the best fluid holdout because they tend to overlap and reduce the porosity at the paper surface (see Inks). 

Natural resins are generally described as solid or semisolid amorphous, fusible, organic substances that are formed in plant secretions. They are usually transparent or translucent yeUow-to-brown colored, and are soluble in organic solvents but not in water. The principal uses for natural resins are in varnishes, printing inks, adhesives, paper size, and polymer compositions. The term natural resins includes tree and plant exudates, fossil resins, mined resins, and shellac. They often have been altered from their original state during isolation and processing. For some appHcations, the resins have been chemically modified to increase their industrial utiUty. 

Calcium carbonate is one of the most versatile mineral fillers (qv) and is consumed in a wide range of products including paper (qv), paint (qv), plastics, mbber, textiles (qv), caulks, sealants (qv), and printing inks (qv). High purity grades of both natural and precipitated calcium carbonate meet the requirements of the Food Chemicals Codex and the United States Pharmacopeia and are used in dentifrices (qv), cosmetics (qv), foods, and pharmaceuticals (qv). 

Hem JD (1985) Study and interpretation of the chemical characteristics of natural water, 3rd edn. US Govt Printing Office (USGS Water Supply Paper 2254), Washington, pp 66-69... 

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