Uncoated recording media

An uncoated recording medium, consisting of:

• a blend of hardwood chemical pulp fibers, softwood chemical pulp fibers, and thermomechanical pulp (TMP) fibers, wherein a total fiber content is at least 80 wt % of a total wt % of the uncoated recording medium, and wherein the hardwood chemical pulp fibers are present in an amount ranging from about 20 wt % to about 70 wt % relative to the total fiber content, the softwood chemical pulp fibers are present in an amount ranging from about 30 wt % to about 50 wt % relative to the total fiber content, and the TMP fibers are present in an amount ranging from about 10 wt % to about 30 wt % relative to the total fiber content;
• a combination of titanium dioxide and calcium carbonate, an amount of the titanium dioxide ranging from about 1.5 wt % to about 5 wt % of the total wt % of the uncoated recording medium, and an amount of the calcium carbonate ranging from about 3.5 wt % to about 5 wt % of the total wt % of the uncoated recording medium;
• calcium chloride (CaCl2) present in an amount ranging from about 6,000 μg per gram of the uncoated recording medium to about 15,000 μg per gram of the uncoated recording medium;
• and
• optionally a size press starch additive, an internal starch additive, any of alkyl ketene dimer or alkenyl succinic anhydride, or combinations thereof;
• the uncoated recording medium having a basis weight ranging from about 50 g/m2 to about 61 g/m2, and wherein when ink or toner is printed on the medium, a percentage of strikethrough of the ink or toner from a front side of the medium to a back side of the medium ranges from about 14% to 25%.