Creation of lithographic printing lithographs - Lithography printing, lithography, lithograph - scre

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Now, with high quality replicas of paintings and other works of art as a decorative painting, landscaping, has become a fashion, a number of copies and industrialization artwork into people's lives. From the art point of view, high quality replicas of the original copy is not, technically, the original copy of both high and also need to create a new style. Currently used for printing artwork created by copying and woodblock printing technologies?? Woodcut, gravure?? Copper engraving, offset printing?? Lithograph, porous printing?? Network prints. The common use of these printing features of self-portraits, self-carved, self-printed. And can be the basis of a creative, get paintings.

Â Lithographic printing?? Lithograph Is a three-dimensional plastic art prints, which is characterized by the use of tools such as knives and pen directly on the stone in the characterization of different materials, you can print multiple copies of the original. Lithographic printing is

lithography, invented in 1798 by the German, now more than lithographs created for.
1. Lithography Edition production Lithography stones used in stone also known as India, is a special of limestone (calcium carbonate), first used in Germany, Pakistan by Wayne, a thickness of about 10cm, calcium carbonate content of 97% to 99%, the surface of porous , high hardness, color and iron content in accordance with the decision, including bluestone best printing performance.

(1) stone surface treatment Be on the slate before the plate surface treatment, the plate surface wetting, spreading sand, the two relative grinding stone or abrasive grinding, after wetting with alum solution to stone surface generate Al (OH) 3, with the formation of insoluble in water absorption capacity of the weak alkaline film, chemical reaction as follows:

3CaCO3 +2 KAl (SO4) 2 +3 H2O = 3CaSO4 + K2SO4
+2 Al (OH) 3 +3 CO2
(2) a sense of lipid treatment
Flu treatment that fat rich in fatty acids such as oily substances used for the main components of the ink, or pen directly on the stone painting, writing, forming lipophilic positive Graphic; transfer paper transfer if the copy is available.

Flu treatment is the use of lipid fatty acids in the stearic acid (CH3? (CH2) 16? COOH), oleic acid and oleic acid (CH3 (CH2) 7CH = CH (CH2) 7? COOH) and so on with carboxyl long-chain molecules generate insoluble calcium salts of fatty acids and calcium or aluminum hydroxide, aluminum and methyl fatty acid formation, water resistance ink absorption material. When fatty acids encountered stones alkaline surface membrane, the fatty acids generated while aluminum production, "Positioning adsorption", that fatty acid molecules in the carboxyl firmly attached to the film in the weak alkaline, while the methyl end up neatly arrangement, to form a strong hydrophobic surface, can absorb all kinds of printing inks and oils, lipophilic layer structure as long as it does not destroy, the use of solvent cleaning printing inks, remain in the pro-oil hydrophobic.

(3) desensitization hydrophilic treatment Stones surface lipophilic graphics, the layout on a blank part of the need to dilute nitric acid containing gum arabic solution to corrosion:

CaCO3 +2 HNO3 Ca (NO3) 2 + H2O + CO2 Blank part of the corrosion layout slightly less than the Photo section and destroyed the stone tablets alkaline surface coating, so that part of gum arabic free acid precipitation, adsorption on the tables of stone, gum arabic and nitric acid reaction as follows:

X? COOK + HNO3 = X? COOH + KNO3
Arab acid X? COOH side chains, there are many polar hydroxyl (OH), with water molecules can expand the role played absorbent oil discharge.

2. Printing Version will be fixed in the platform lithography printing press, the water wetting layout, some attached to a blank enough water, and then dwell with the ink roller, ink, graphic section attached to the page in its overlying pressure after the completion of the printing paper .

If the stones need to be stored on a plate coated in a thick layer of glue Arab trees, making it dry conjunctiva, to protect the plate; if stored longer needs to wash away ink layer, with no oxidation of the asphalt oil to keep graphic conjunctival part of lipophilic not be destroyed.

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