Lubricant for the hot forming of metals

A lubricant for the hot forming of metals, wherein the lubricant is an aqueous suspension containing, with respect to the solid constituents, at least the following constituents:

• 55 to 85 wt % of a solid lubricating agent comprising a mixture of talc and a potassium mica, wherein the ratio of talc to potassium mica in the solid lubricating agent is 2.0 to 5.0,
• 10 to 30 wt % of an adhesive agent selected from a polyvinyl acetate, sodium water glass and dextrin or a mixture of same,
• 2 to 10 wt % of a thickener selected from hydroxy cellulose, hydroxyethyl cellulose, hydroxyproply cellulose, carboxymethyl cellulose, methyl cellulose, ethyl cellulose, methylethyl cellulose, hydroxyethylmethyl cellulose, hydroxypropylmethyl cellulose, ethylhydroxymethyl cellulose, carboxymethylhydroxy cellulose, dextrin, starch, organically modified bentonite, smectite and xanthan gum,
• 0 to 10 wt % of further auxiliary agents, and
• not more than 10 wt % of graphite,
• wherein the lubricant, with respect to the solid constituents, contains 0 to 2.5 wt % boron-bearing compounds.