Abstract: The present invention relates to a glass including, in mole percentage on an oxide basis: 60-75% of SiO2; 8-20% of Al2O3; 5-16% of Li2O; and 2-15% of one or more kinds of Na2O and K2O in total, in which a ratio PLi of the content of Li2O to a total content of Li2O, Na2O, and K2O is 0.40 or more, and a total content of MgO, CaO, SrO, BaO, and ZnO is 0-10%.

Abstract: An antifouling layer-attached glass substrate includes a glass substrate having a pair of main surfaces facing each other, and an antifouling layer formed on or above at least one main surface of the glass substrate. At the time of measuring an absorbance inside the antifouling layer-attached glass substrate by a Fourier transform infrared spectrophotometer according to ATR method (Attenuated Total Reflection) from a surface on a side where the antifouling layer is formed, in the case where an absorbance value at 3,955 cm?1 is set to 0.10, a value (H2O absorbance) obtained by subtracting, as a base, the absorbance value at 3,955 cm?1 from a peak value of an absorbance peak which appears around 3,400 cm?1 is 0.010 or more.

Abstract: The present invention relate to a transparent substrate laminate (10) having a transparent substrate (12), an antireflection layer (14) and an antifouling layer (16) in this order, the antireflection layer (14) contains a low-refractive index layer (142) and a high-refractive index layer (144) laminating alternately, the antifouling layer (16) contains a fluorine-containing organic compound, and when washing with ethanol and washing with a fluorine solvent under specific conditions are carried out on the antifouling layer (16) in this order, the antifouling layer (16) satisfies a ratio (i)/(ii) being more than 1 in which (i) represents a fluorine amount after the washing with ethanol and (ii) represents a fluorine amount after the washing with the fluorine solvent, and in which the fluorine amount (F amount) is measured by using an X-ray fluorescence instrument (XRF).