Substance: 80gsm-Brightness : 100% above-Color: white,Whiteness :CIE167-Grade :All purpose Premium Paper,-Sheet in Ream:500-Roughness:140ml/Min-Thickness :110um-Ream box :5 Ream-Substance: 75gsm-Brightness : 100% above-Color: white,Whiteness :CIE167-Grade :All purpose Premium Paper,-Sheet in Ream:500-Roughness:140ml/Min-Thickness :110um-Ream box :5 Ream -Substance: 70gsm-Brightness : 100% above-Color: white,Whiteness :CIE167-Grade :All purpose Premium Paper,-Sheet in Ream:500-Roughness:140ml/Min-Thickness :110um-Ream box :5 Ream