The low back nbsp insider of high quality of glasses price of a thousand yuan takes off the inside story of the glasses

The low back nbsp insider of high quality of glasses price of a thousand yuan takes off the inside story of the glasses


"A thousand yuan glasses, have only worn for several months, blur, too inconceivable! " Recently, China pack Deputy Director, committee of comprehensive resource utilization, the intersection of environmental expert and gold lion Dong streamline reader's hot line of " scientific and technological newspaper of Beijing ".
Gold lion Dong tell reporters, on May 2, he is in an optical shop that locates adjacent Zizhu Qiao, the flower is 1500 first wives and a pair of resin lens frame glasses. Originally, he adapts to the sense, however, when summer will be in the past soon, gold lion Dong but definition to feel glasses poorer and poorer. Originally, he thought it was one's own eyesight that dropped, however, after observing the glasses slice carefully, but he finds, in the middle of one of the glasses, unexpectedly a lot of tiny crackle appears, if does not look carefully, will not be found easily. "I treasure the glasses very much, pay attention to maintaining too at ordinary times, always handle with care, has not thrown touching, why is there crackle? " Gold lion Dong say.
Will it be the beginning September, gold lion Dong hold glasses, come, buy those optical shop of glasses at that time again, the shop assistant tells him, this kind of resin lens is not high temperature resistant, if the environment around exceeds 60 degrees, the chemical property of the lens will change, influence the definition of the glasses, so have a bath, steam the sauna and can't wear the glasses, can't put the glasses of the resin lens in the car either in summer, can't be close to the heating in winter.
"But, why are not these special requirements told me when I buy the glasses? I have not got any relevant written historical materials that briefed on, are not reminded orally either. As far as I know, this is only one in numerous issues of the trade of optical shop at present, I think, the glasses trade must rectify! " Gold lion Dong say.
The material science of Beijing University of Chemical Tech. and Mr. Li of the project institute tell reporters, since 2000, the resin lens begins to popularize, has substituted the glass lens, divide into also now and add hard and adding the membrane, ultrathin, dustproof, kind of defending the fog etc., resin color of spectacle frame getting black no longer too, print spend and the intersection of fretwork and style of pattern secretly still. The resin mirror holder is difficult to deform, more whippy, let the persons who wear feel light and small and exquisite.
The qualified resin glasses are gathered organic materials such as carbonic acid ester,etc. to make, resin material it heats the temperature out of shape to be should be at over 100 , but because resin glasses slice is different from the glass lens, it is composed of resin structure 3 layers thin and thicks, for instance, the temperature exceeds 60 , the resin will be pushed between every layer while swelling, it adds all layers of inflation rate to to be different and then, the lens is damaged certainly, the tiny crackle or out of shape will appear, and then become fuzzy. In addition, some inferior glasses because the material is relatively bad, probably will be deformed at the slightly high temperature, when especially put such glasses in the car in summer, the ones that will be produced to a certain degree are aging and deforming.
Mr. Li thinks, in this respect, the sales forces of the glasses should really give consumer the corresponding warning, because consumers will not usually go to find out about the environment for use of the resin glasses voluntarily. Consumers need to distinguish and choose conscientiously too during purchase.

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