多次书写纸 打印不用墨
<p> <span word="Experts">Experts</span> <span word="have">have</span> <span word="revealed">revealed</span> <span word="a">a</span> <span word="new">new</span> <span word="type">type</span> <span word="of">of</span> <span word="paper">paper</span> <span word="that">that</span> <span word="can">can</span> <span word="be">be</span> <span word="erased">erased</span> <span word="and">and</span> <span word="rewritten">rewritten</span> <span word="without">without</span> <span word="the">the</span> <span word="need">need</span> <span word="for">for</span> <span word="ink">ink</span>.</p><p> 研究人员成功研制出一种可重复书写的新型纸张，且书写打印时无需油墨。</p><p><span word="They">They</span> <span word="say">say</span> <span word="that">that</span> <span word="even">even</span> <span word="in">in</span> <span word="early">early</span> <span word="prototype">prototype</span> <span word="form">form</span>, <span word="it">it</span> <span word="can">can</span> <span word="be">be</span> <span word="rewritten">rewritten</span> 20 <span word="times">times</span> <span word="without">without</span> <span word="affecting">affecting</span> <span word="the">the</span> <span word="resolution">resolution</span>.</p><p> 研究者称，即使是初期版本，这种纸也能反复擦写20次，而且可保有较高的清晰度。</p><p><span word="It">It</span> <span word="works">works</span> <span word="by">by</span> <span word="using">using</span> <span word="ultraviolet">ultraviolet</span> <span word="light">light</span> <span word="to">to</span> <span word="photobleach">photobleach</span> <span word="a">a</span> <span word="dye">dye</span> <span word="in">in</span> <span word="the">the</span> <span word="paper">paper</span>, <span word="except">except</span> <span word="the">the</span> <span word="portions">portions</span> <span word="that">that</span> <span word="constitute">constitute</span> <span word="the">the</span> <span word="text">text</span> <span word="on">on</span> <span word="the">the</span> <span word="paper">paper</span>.</p><p> 再写纸的原理是：利用紫外光漂白某些染料，使之呈现出无色状态，而只有文字或图像可在纸上显示出来。</p><p><span word="The">The</span> <span word="new">new</span> <span word="rewritable">rewritable</span> <span word="paper">paper</span> <span word="can">can</span> <span word="be">be</span> <span word="erased">erased</span> <span word="and">and</span> <span word="written">written</span> <span word="on">on</span> <span word="more">more</span> <span word="than">than</span> 20 <span word="times">times</span> <span word="with">with</span> <span word="no">no</span> <span word="significant">significant</span> <span word="loss">loss</span> <span word="in">in</span> <span word="contrast">contrast</span> <span word="or">or</span> <span word="resolution">resolution</span>.</p><p> 这种新的再写纸能反复擦写20次多，且不会影响对比度或清晰度。</p><p><span word="Chemists">Chemists</span> <span word="at">at</span> <span word="the">the</span> <span word="University">University</span> <span word="of">of</span> <span word="California">California</span>,<span word="Riverside">Riverside</span> <span word="say">say</span> <span word="their">their</span> <span word="rewritable">rewritable</span> <span word="paper">paper</span> <span word="is">is</span> <span word="based">based</span> <span word="on">on</span> <span word="the">the</span> <span word="color">color</span> <span word="switching">switching</span> <span word="property">property</span> <span word="of">of</span> <span word="commercial">commercial</span> <span word="chemicals">chemicals</span> <span word="called">called</span> <span word="redox">redox</span> <span word="dyes">dyes</span>.</p><p> 加利福利亚大学河滨分校 <span word="The">The</span> <span word="dye">dye</span> <span word="forms">forms</span> <span word="the">the</span> <span word="imaging">imaging</span> <span word="layer">layer</span> <span word="of">of</span> <span word="the">the</span> <span word="paper">paper</span>.</p><p> 这种染料能形成纸的成像层。</p><p>'<span word="This">This</span> <span word="rewritable">rewritable</span> <span word="paper">paper</span> <span word="does">does</span> <span word="not">not</span> <span word="require">require</span> <span word="additional">additional</span> <span word="inks">inks</span> <span word="for">for</span> <span word="printing">printing</span>, <span word="making">making</span> <span word="it">it</span> <span word="both">both</span> <span word="economically">economically</span> <span word="and">and</span> <span word="environmentally">environmentally</span> <span word="viable">viable</span>,' <span word="said">said</span> <span word="Yadong">Yadong</span> <span word="Yin">Yin</span>, <span word="a">a</span> <span word="professor">professor</span> <span word="of">of</span> <span word="chemistry">chemistry</span>, <span word="whose">whose</span> <span word="lab">lab</span> <span word="led">led</span> <span word="the">the</span> <span word="research">research</span>, <span word="which">which</span> <span word="is">is</span> <span word="published">published</span> <span word="today">today</span> <span word="in">in</span> <span word="Nature">Nature</span> <span word="Communications">Communications</span>.</p>
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