48B,BRIGHTNESS,TESTER,
INTRODUCTION,
The,instrument,is,mainly,used,to,test,the,whiteness,of,diversified,objects,such,as,paper,and,board,,pulps,and,chemical,fiber,,textile,,plastic,,ceramic
,,enamel,,fecula,,salt,,white,cerement,,porcelain,clay,and,French,chalk,,etc.,It,can,also,be,used,to,test,the,optical,performance,of,sheet,materials,,for,example,,opacit
y,test.,

APPLICATIONS,,
Paper,,Board,,Pulps,,Chemical,fiber,,Textile,,Plastic,,Ceramic,,Enamel,,Fecula,,Salt,,White,cerement,,Porcelain,clay,and,French,chalk,,etc.

SPECIFICATIONS,
1.,This,instrument,complies,with,GB3978-83,,Standard,illuminator,and,illuminating--viewing,
conditions.,,
2.,Simulate,D65,illuminator,to,illuminate.,Adopt,d/o,illuminating--viewing,geometrical,coanditions.,Diameter,of,the,diffusion,sphere,is,150mm,and,diameter,of,the,testing,hole,is,25mm.,,
3.,Light,absorber,is,provided,to,eliminate,the,effect,of,specular,reflection.,Peak,wavelength,of,spectral,power,distribution,of,R457,whiteness,optical,system,is,457nm,and,its,half-width,is,44nm.,
4.,Measure,and,display,the,whiteness,,Fluorescent,whiteness,(whitening,rate),and,opacity,(%),etc.,digitally.,
5.,Indication,error:, %,
6.,Sample,size:,Test,plate,diameter,should,not,be,less,than,30mm,while,sample,thickness,should,not,exceed,40mm.,
7.,Power,supply:,160V-260V,,50Hz,, ,
8.,Measure,time:,3s,
9.,Working,condition: -40oC,,relative,humidity,＜85％.,
10.,Size,and,weight:,L×W×H＝365×260×425mm,,11kg
,
FEATURES,
1.,Measure,the,Blue,Reflectance,Factor,(R457),of,samples.,Blue,Reflectance,Factor,is,so,called,“Blue,Whiteness”,or,“ISO,Brightness”.,,
2.,Analyze,the,sample,to,find,out,whether,it,contains,any,fluorescent,brightener.,If,so,,measure,the,fluorescent,whiteness,further,,namely,whitening,rate.,
3.,Measure,the,opacity,,transparency,,light,scattering,coefficient,and,light,absorbing,coefficient.,

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