instance_of ink eraser
___MASK99___ is a mass noun referring to commercially manufactured writing materials , including cut paper , envelopes , writing implements , continuous ___MASK99___ , and other ___MASK64___ supplies . ___MASK99___ includes materials to be written on by hand ( e . g ., ___MASK60___ paper ) or by equipment such as computer printers . IMAGE ( from Imager for Magnetopause - to - Aurora Global ___MASK76___ ), or Explorer 78 , was a NASA MIDEX ___MASK100___ that studied the global response of the Earth ' s ___MASK90___ to changes in the solar wind . It was launched March 25 , 2000 by a Delta II rocket from Vandenberg AFB and ceased operations in ___MASK10___ 2005 . A ___MASK26___ is a nearly incompressible fluid that conforms to the shape of its container but retains a ( nearly ) constant volume independent of pressure . As such , it is one of the four fundamental states of matter ( the others being solid , gas , and plasma ), and is the only state with a definite volume but no fixed shape . A ___MASK26___ is made up of tiny vibrating particles of matter , such as atoms , held together by intermolecular bonds . ___MASK38___ is , by far , the most common ___MASK26___ on Earth . Like a gas , a ___MASK26___ is able to flow and take the shape of a container . Most liquids resist compression , although others can be compressed . Unlike a gas , a ___MASK26___ does not disperse to fill every space of a container , and maintains a fairly constant density . A distinctive ___MASK56___ of the ___MASK26___ state is surface tension , leading to wetting phenomena . A quill ___MASK18___ is a ___MASK35___ made from a moulted flight feather ( preferably a primary wing - feather ) of a large bird . Quills were used for writing with ink before the invention of the dip ___MASK18___ , the metal - nibbed ___MASK18___ , the fountain ___MASK18___ , and , eventually , the ballpoint ___MASK18___ . The hand - cut goose quill is rarely used as a calligraphy tool , because many papers are now derived from wood pulp and wear down the quill very quickly . However , it is still the tool of choice for a few professionals and provides an unmatched sharp stroke as well as greater flexibility than a steel ___MASK18___ . Printing is a ___MASK72___ for reproducing ___MASK55___ and images using a master form or template . The earliest examples include Cylinder seals and other objects such as the Cyrus Cylinder and the Cylinders of Nabonidus . The earliest known form of woodblock printing came from China dating to before 220 A . D . Later developments in printing include the movable type , first developed by Bi Sheng in China . Johannes Gutenberg introduced mechanical movable type printing to Europe in the 15th century . His printing press played a key role in the development of the Renaissance , Reformation , the ___MASK61___ of Enlightenment , and the scientific revolution and laid the material basis for the modern knowledge - based economy and the spread of learning to the masses . A brush is a ___MASK44___ with bristles , ___MASK13___ or other filaments , used for cleaning , grooming hair , make up , painting , ___MASK24___ finishing and for many other purposes . It is one of the most basic and versatile tools known to mankind , and the average household may contain several dozen varieties . It generally consists of a handle or block to which filaments are affixed either parallel - or perpendicular - wise , depending on the way the brush is to be gripped during use . The material of both the block and bristles or filaments is chosen to withstand hazards of its ___MASK94___ , such as corrosive chemicals , heat or abrasion . An eraser , ( also called a rubber outside of U . S ., from the ___MASK42___ first used ) is an ___MASK1___ of ___MASK99___ that is used for removing writing from paper . Erasers have a rubbery consistency and come in a variety of shapes , sizes and colours . Some pencils have an eraser on one end . Less expensive erasers are made from synthetic rubber , but more expensive or specialized erasers are vinyl , plastic , or gum - like materials . Cheaper erasers can be made out of synthetic soy - based gum . ___MASK97___ is a form of visual art in which a person uses various ___MASK97___ instruments to mark paper or another two - dimensional medium . Instruments include graphite pencils , ___MASK18___ and ink , inked brushes , wax color pencils , crayons , charcoal , chalk , pastels , various kinds of erasers , markers , styluses , various metals ( such as silverpoint ) and electronic ___MASK97___ . ___MASK2___ is the creation of a ___MASK89___ or convention for the ___MASK4___ of an object , system or measurable human interaction ( as in architectural blueprints , engineering drawings , business processes , circuit diagrams , and sewing patterns ). ___MASK2___ has different connotations in different fields ( see design disciplines below ). In some cases , the direct ___MASK4___ of an object ( as in pottery , engineering , management , coding , and graphic design ) is also considered to be design . A ___MASK66___ is a material that changes the color of reflected or transmitted light as the result of wavelength - selective absorption . This physical process differs from fluorescence , phosphorescence , and other forms of luminescence , in which a material emits light . A ___MASK53___ is a colored substance that has an affinity to the substrate to which it is being applied . The ___MASK53___ is generally applied in an aqueous ___MASK70___ , and ___MASK91___ require a mordant to improve the fastness of the ___MASK53___ on the fiber . An ___MASK16___ eraser is an instrument used to remove ___MASK16___ from a writing ___MASK24___ , more difficult than removing pencil markings . Older types are a metal scraper , which literally scrapes the ___MASK16___ off the ___MASK24___ , and an eraser similar to a rubber pencil eraser , but with additional abrasives , such as sand , incorporated . Fibreglass erasers also work by abrasion . These erasers physically remove the ___MASK16___ from the paper . There is some unavoidable damage with most types of paper and ___MASK16___ , where the paper absorbs some ___MASK16___ . The chemical ___MASK16___ eradicator contains a substance that reacts with some inks removing their pigmentation and hiding the writing . ___MASK16___ is a ___MASK26___ or paste that contains pigments or dyes and is used to color a ___MASK24___ to produce an image , text , or design . ___MASK16___ is used for drawing or writing with a pen , brush , or quill . Thicker inks , in paste form , are used extensively in letterpress and lithographic printing . A pencil is a ___MASK35___ or art medium constructed of a narrow , solid pigment core inside a protective casing which prevents the core from being broken or leaving marks on the user  s hand during use . A synthetic rubber is any artificial ___MASK79___ . These are mainly polymers synthesised from petroleum byproducts . About of rubbers are produced annually , and of that amount two thirds are synthetic . Global revenues generated with synthetic rubbers are likely to rise to approximately US $ 56 billion in 2020 . Synthetic rubber , like natural rubber , has uses in the ___MASK84___ for tires , door and window profiles , hoses , belts , matting , and flooring . A ___MASK18___ ( Latin : " penna ", feather ) is a ___MASK35___ used to apply ink to a surface , such as paper , for writing or drawing . Historically , reed pens , quill pens , and dip pens were used , with a nib dipped in ink . Ruling pens allow precise adjustment of line width , and still find a few specialized uses , but technical pens such as the Rapidograph are more commonly used . Modern types also include ballpoint , rollerball , fountain , and felt or ceramic tip pens .