... % 4 OEM service availabe A4 paper 70-80gMaterialWeightBrightnessPackingSizeWood pulp80gsm105%500 sheets per ream , 5 reams per carton A3,A4,B4,B5 ... ,doesn;t generate acidic gasSuitable for all kinds of laser,ink,jet printers and copiers.We are manufacutre of paper ,so ...