Does anyone know what light-sensitive paper is?
366184
photo-paper is light sensitive as you have to keep negatives in the dark....sorry to all computor people who have copiers there are still old people out there..  try your local photography shop.
192184
Aluminum Foil\n\nNot a paper actually.
1041762
You can use Matt or Glossy paper for this purpose.\nI perfer glossy.\nU should need to select the thickness of the paper.The cost is based on the thickness of Paper.\n\nMatt and Glossy are most pefered one which is used in Digital Printing
475249
Paper is made from wood, which is made up mainly of white cellulose. Wood also has a lot of a dark substance in it called lignin, which ends up in the paper, too, along with the cellulose. The exposure of lignin to air and sunlight is what turns paper yellow.\n\nLignin makes wood stiff and trees stand upright. You could say it acts as a glue to bind the cellulose fibers together. It is a polymer, a substance that is formed by the joining of simpler molecules into giant molecules that act differently than the smaller molecules did. Dr. Hou-Min Chang, a professor of wood and paper science at N.C. State University in Raleigh, N.C., compares lignin to the concrete used in buildings, with cellulose as the steel frame. Without lignin, Chang says, a tree could only grow to be about 6 feet tall. Lignin also helps protect the wood from pests and other damage.\n\nNewsprint, which must be produced as economically as possible, has more lignin in it than finer papers. At the mill, the wood that will be turned into newsprint is ground up, lignin and all.\n\nPaper manufacturers utilize the benefits of lignin in some types of paper, though. Brown kraft paper, the dark brown paper used in grocery store bags, and cardboard are stiff and sturdy because they have more lignin in them, and because those kinds of paper aren't treated with bleaching chemicals. It doesn't matter how dark they are because the printing on them is limited.\n\nTo make a fine white paper, the mill puts the wood through a chemical solvent process, which separates and discards the lignin. Pure cellulose is white, and the paper made from it will be white and will resist yellowing.\n\nLignin eventually turns paper yellow because of oxidation. That is, the lignin molecules, when exposed to oxygen in the air, begin to change and become less stable. The lignin will absorb more light, giving off a darker color. Chang says that if newsprint were kept completely out of sunlight and air, it would remain white. After only a few hours of sunlight and oxygen, however, it will start to change color.
455708
It's substancially heavy paper, like what you'd see a greeting card made of.  It's good for... making greeting cards and any other project that you might need to have more durability than regular paper.  It's great for scrapbooking.
1086175
Regular paper.  You need to check your printer to see if you left something in it that was supposed to be removed.  Or maybe something fell in.....that's causing the paper to jam.
680797
Paper is insoluble  in water.\nPaper is made from wood - plant fiber.
501671
Paper is generally graded by "weight". The higher the weight the thicker the paper. Paper at opposite ends (the thick and the very fine can both be expensive.) Standard notebook/typing paper is generally around 20 lbs.\n\nAlso the material used to make the paper can affect quality and cost. Paper with a linen content for example is of higher quality than your standard wood pulp based papers.\n\nsome extra info here: \n\nhttp://www.techcolor.com/help/paper.html\nhttp://www.cpsa.org/PRODUCT_RESEARCH/PaperMaking.html
760855
Packaging Materials Purchase - March-April 2002 \n... printing machines for soft PVC and decorative lamination paper. ... PP HM, aluminium, foil, blister foil, OLB paper, PVC and shrink PVC.Shrink PVC ,etc. ...\nhttp://www.indianpurchase.com/magonline/Packaging/200204/article8.htm
409297
ok here is the thing\nif you are trying to calculate the thickness of a piece of paper you will need some equpment. Even though there is a lot of room for human error you still can get a fair estimate. \n\nwhat you need is 2 extrememly smooth glass plates and a lineat light source say a laser pointer. \n\nput one glass plate on a table place your paper on the side of the glass and put the other glass plate on the top of the two so that you will get a wedge between the two glasses. \n\nnow point the laser pointer perpendicular to the bottom glass plate and place a screen for reflections. you will get multiple reflections. (btw you need to know the frequency of the light emitted from the pointer.)\n\nthis is the set up\nfor calculations do a little search on air wedge interference \n\ni dont think you will need refractive indexes since you are using the same glass\nwith a little algebra you can figure it out
506453
The original paper is by Lee, Kang; Geem, Zong; Lee, Sang-ho; Bae, Kyu-woong. But I have not found it on the web.
995925
Today it is done with high tech scanners and even more high tech photo quality printers. That's the easy part. the hard part is getting the right quality paper because it's almost a cloth material.
876743
When our good white paper is prepared it is bleached.This removes all colour from it or chemically the present oxygen.But after a long period of time after this paper is exposed to air,the oxygen molecules are regained and the old colour comes back.\n\nThis is because generally CaOCl2 (bleaching powder) or SO2 is used.When a stronger bleacher is used the regaining of colour wont happen.
364217
The paper is really a blend of linen and cotton and is not green.  It has red and blue fibers, of different lengths, running through it and the printing ink is green.  For more "trivia" please see:\nhttp://www.factmonster.com/ipka/A0774850.html
1004315
Because Manufacturers can replicate light/temp/humidity etc very easially these days using modern technology. They can work out how much sun light etc a photo will be exposed to in that period (100 yrs) and replicate intensively dratically reducing the time needed to test the paper.
378587
the color change that paper undergoes overtime can be traced to the substances that make up its raw materials. since paper comes from trees, you can expect that it contains cellulose, or the complex carbohydrate (polysaccharride) and the polymer which cements the cellulose molecules together, lignin. lignin is a complex carbohydrate which makes tree trunks and branches sturdy and hard. \n\nthe exposure of lignin to sunlight and air is what turns the paper yellow. when lignin oxidizes it begins to become more and more unstable. it then absorbs more light which in turn causes lignin to emit a darker color.
261645
Paper, thin sheets of compressed vegetable cellulose fibers. Paper is used for writing and printing, for wrapping and packaging, and for a variety of special purposes ranging from the filtration of precipitates from solutions to the manufacture of certain types of building materials. Paper is a necessity in modern civilization, and the development of machinery for its high-speed production has been largely responsible for the increase in literacy and the raising of educational levels of people throughout the world.\n\n\nThe basic process of making paper has not changed in more than 2,000 years. It involves two stages: the breaking up of raw material in water to form a suspension of individual fibers and the formation of felted sheets by spreading this suspension on a suitable porous surface, through which excess water can drain.\n\nIn making paper by hand, the raw material—straw, leaves, bark, rags, or other fibrous material—is placed in a vat or trough and is pounded with a heavy pestle or hammer to separate the fibers. During the first portion of this operation, the material is washed with running water to remove impurities, but after the fibers have been sufficiently broken up, they are kept in suspension, and the water in the vat is not changed. At this stage the liquid material, called half stuff, is ready for the actual process of papermaking. The chief tool of the papermaker is the mold, a reinforced sheet of metal mesh having either a square mesh pattern, called a wove pattern, or a pattern of more widely spaced longitudinal wires held together with smaller transverse wires, called a laid pattern. The mold pattern imprints itself on the finished sheet of paper, and thus handmade papers that are not given special finishes are identified as wove or laid papers, depending on the style of mold that is used in their making.\n\nThe mold is placed inside a removable wooden frame called a deckle, which forms a low rim around its edge. The papermaker dips the mold and deckle into a vat containing the half stuff; when the mold and deckle are removed from the vat, the surface of the mold is coated with a thin film of fiber-water mixture. The device is then shaken forward and backward and from side to side. This shaking has two effects; it distributes the mixture evenly on the surface of the mold and causes the individual fibers to interlock with those adjacent, giving strength to the sheet. While the device is being shaken, much of the water from the mixture drains out through the mold mesh. The device, with its formed sheet of wet paper, is then laid aside until the paper is sufficiently cohesive to permit the removal of the deckle.\n\n\nAfter the deckle has been taken from the mold, the mold is turned over and the sheet of paper is laid smoothly on a sheet of woven woolen cloth, called a felt. Another felt is laid over the sheet of paper, and the process is repeated; the process of placing the paper between two felts is known as couching. When a number of sheets of paper have been interleaved with felts, the entire pile, called a post, is placed in a hydraulic press and subjected to a pressure of 100 or more tons, expelling most of the water remaining in the paper. The sheets of paper are then separated from the felts, stacked, and pressed. The process of pressing the stack of paper is repeated several times, and each time the stack is built up in a different order with the individual sheets in different positions relative to one another. This procedure is called exchanging, and its repetition improves the surface of the finished paper. The final stage in papermaking is drying. The paper is hung, in groups of four or five sheets, over ropes in a special drying room until its moisture has almost completely evaporated.\n\nPapers that are to be used for writing or printing with ink require additional treatment following drying, because without such treatment the paper would absorb ink and yield fuzzy lines or impressions. The