The Asian Age - - Science + Health -

Bei­jing, Dec. 8: Sci­en­tists have de­vel­oped an easy­tomake “rewritable” pa­per that can be drawn or printed on over and over again.

Printed ma­te­ri­als of­ten get used once and are then dis­carded, creat­ing waste and po­ten­tial pol­lu­tion.

Re­searchers in­clud­ing those from the Fu­jian Nor­mal Univer­sity in China wanted to de­velop a sim­ple method for mak­ing long- last­ing rewritable pa­per that can be wiped clean sim­ply by chang­ing the tem­per­a­ture.

The mes­sages can last more than half a year, com­pared to other rewritable pa­pers whose mes­sages fade af­ter a few days or a few months, ac­cord­ing to a study pub­lished in the jour­nal ACS Ap­plied Ma­te­ri­als & In­ter­faces.

The idea is not new, with sev­eral re­search groups pur­su­ing dif­fer­ent de­vel­op­ment strate­gies. How­ever, many of these ap­proaches have draw­backs, such as com­plex fab­ri­ca­tion, the chem­istry that re­lies on ul­tra­vi­o­let light to erase the writ­ing.

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