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Color-shifting inks reflect various wavelengths in white light differently, depending on the angle of incidence to the surface. An unaided eye will observe this effect as a change of color while the viewing angle is changed. A color copier or scanner can copy a document only at one fixed angle relative to the document's surface. [2]
Security printing is the field of the printing industry that deals with the printing of items such as banknotes, cheques, passports, tamper-evident labels, security tapes, product authentication, stock certificates, postage stamps, and identity cards. The main goal of security printing is to prevent forgery, tampering, or counterfeiting.
Eye protection is protective gear for the eyes, and sometimes face, designed to reduce the risk of injury. Examples of risks requiring eye protection can include: impact from particles or debris , light or radiation , wind blast , heat , sea spray or impact from some type of ball or puck used in sports.
Security solutions that help keep your devices virus free and secure from thieves who try to steal your identity or drain your bank account.
The results indicated that those who read using the PDF files performed much worse than those reading off of a paper. A conclusion was reached that certain aspects of screen reading, such as scrolling, can impede comprehension. [9] However, not all experiments have concluded that reading from a digitized screen can be detrimental.
Protect your computer regardless of its age, with hardware repair or replacement coverage. Get Started. Extended Computer Protection - From AOL FAQs.
Multipart stationery is paper that is blank, or preprinted as a form to be completed, comprising a stack of several copies, either on carbonless paper or plain paper, interleaved with carbon paper. The stationery may be bound into books with tear-out sheets to be filled in manually, continuous stationery (fanfold sheet or roll) for use in ...
Screen protectors are made of either plastics, such as polyethylene terephthalate (PET) or thermoplastic polyurethane (TPU), or of laminated tempered glass, similar to the device’s original screen they are meant to protect. Plastic screen protectors cost less than glass and are thinner (around 0.1 mm (0.004 in) thick, compared to 0.3 to 0.5 ...