Glass article and glass substrate for information recording media using the same

A glass article having:

• a rate of dissolution in an acidic liquid of from 20 to 60 nm/min in terms of an etching rate in immersing in a 0.1% by weight 50° C. aqueous solution of hydrofluoric acid;
• and
• an average linear thermal expansion coefficient of 70×10−7/° C. or higher as measured in the range of from −50° C. to 70° C.,
• in which a working temperature of the glass article:
• T4 ° C. and a liquidus temperature of the glass article:
• TL ° C. satisfy the relationship:
• T4−TL≧−100° C.,
• and the glass article comprising:
• 60 to 68 mol % SiO2;
• 4 to 10 mol % Al2O3;
• 7 to 15 mol % Li2O;
• 8 to 20 mol % Na2O;
• 0 to 2 mol % K2O;
• 0.1 to 5 mol % MgO;
• 1 to 8 mol % CaO;
• 0 to 3 mol % SrO;
• 0 to 2 mol % BaO;
• 0 to 3 mol % TiO2;
• 0 to 3 mol % ZrO2;
• and
• 0 to 3 mol % other ingredient(s),
• wherein the sum of Li2O, Na2O and K2O is 18 to 35 mol % and the sum of MgO, CaO, SrO and BaO is 1.5 to 10 mol %.