Search results
Results From The WOW.Com Content Network
Lithography was invented by Alois Senefelder [1] in the Kingdom of Bavaria in 1796. In the early days of lithography, a smooth piece of limestone was used (hence the name "lithography": "lithos" (λιθος) is the Ancient Greek word for "stone"). After the oil-based image was put on the surface, a solution of gum arabic in water was applied ...
Invented by Bavarian author Aloys Senefelder in 1796, [114] lithography is a method for printing on a smooth surface. Lithography is a printing process that uses chemical processes to create an image. For instance, the positive part of an image would be a hydrophobic chemical, while the negative image would be water. Thus, when the plate is ...
He also invented photo-chromo-lithography by first printing from a photolithographic transfer a faint impression on the paper to serve as a "key", separating the colours on duplicate negatives by varnishes, then photolithographing the dissected portions on stones, finally registering and printing each in its position and particiliar colour ...
The original source for lithographic limestone was the Solnhofen Limestone, named after the quarries of Solnhofen where it was first found. This is a late Jurassic deposit, part of a deposit of plattenkalk (a very fine-grained limestone that splits into thin plates, usually micrite) that extends through the Swabian Alb and Franconian Alb in Southern Germany. [5]
Contact printing/lithography is liable to damage both the mask and the wafer, [38] and this was the primary reason it was abandoned for high volume production. Both contact and proximity lithography require the light intensity to be uniform across an entire wafer, and the mask to align precisely to features already on the wafer.
Offset printing is a common printing technique in which the inked image is transferred (or "offset") from a plate to a rubber blanket and then to the printing surface. When used in combination with the lithographic process, which is based on the repulsion of oil and water, the offset technique employs a flat (planographic) image carrier.
The first Persian book to be printed by lithography was a copy of the Quran, using a printing press imported from Russia to the city of Tabriz. [52] Despite the use of movable typography diminishing between 1852 and 1872, the process of printing from stone lithography flourished in Islamic book production. [52]
Collotype is a gelatin-based photographic printing process invented by Alphonse Poitevin in 1855 to print images in a wide variety of tones without the need for halftone screens. [1] [2] The majority of collotypes were produced between the 1870s and 1920s. [3] It was the first form of photolithography. [4]