Anti-myopia paper sheet
AssigneeGansu Yuda Printing Materials Co., Ltd.
InventorsPING CAO, YONGZHI CAO
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AssigneeGansu Yuda Printing Materials Co., Ltd.
InventorsPING CAO, YONGZHI CAO
Estimating the term…
Provided is an anti-myopia paper sheet capable of effectively preventing eyestrain during reading or writing and reducing a reflectance factor of page reflected light, belonging to the field of stationery products. A number of graphic color blocks are printed all over a printed area for writing of the paper sheet, and each graphic color block is a graphic color block combination of any two colors of light yellow, light green, or light blue. A wavelength of reflected light in the printed area ranges from 538 nm to 590 nm, the brightness ranges from 58% to 72%, and a reflectance factor at 400 nm ranges from 48% to 60%. A page in the printed area has color purity ranging from 6% to 18%. The stimulation of full-frequency light to eyes is effectively prevented, and thus the myopia prevention is achieved.
An anti-myopia paper sheet, wherein a number of graphic color blocks are printed all over a printed area for writing of the paper sheet, and the graphic color block is a combination of graphic color blocks of any two colors of light yellow, light green or light blue;
A printing method of an anti-myopia paper sheet, comprising the following steps:
Dependencies are inferred from the claim text.