Read the following text and answer questions based on that context. 

"The gain in bulk results in gain of absorbency and structural softness .Usually , the bulk correlates well with the water absorbency and softness ( the higher the bulk , the higher the water absorbency and softness ) ( NAME_1 1988 ) .For tissue , the perceived softness is a function of stiffness , bulk , surface texture and fiber quality .In general , at the same grammage , paper with high bulk has a high porosity as well .3.4.3 Bulk Bulk is a necessity for many paperboard and packaging products such as carton boards because it increases porosity , pore volume , thermal insulation , sheet thickness , bending stiffness ,So , it can be understood that in spite of decreasing of the bulk of handsheets , the porosity of handsheets was increased by using of CBP in the newsprint furnish .( 2008 ) showed that MFC films with high hemicellulose content had the highest tensile strength and strain , which was attributed to the decreased porosity of such films , i.e.( 2008 ) showed that MFC films with high hemicellulose content had the highest tensile strength and strain , which was attributed to the decreased porosity of such films , i.e.The reduction of porosity produce a higher interaction in the hydrogen bounding improving the tensile strength .Do you want higher tensile strength , reduced energy consumption , a higher degree of softness in tissue ?The increase in tensile strength obtained from either the intensive mechanical refining of the softwoo Do not include the following keywords: softwoo, handsheet, interaction, text
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