Glass cylinder for a piston-cylinder assembly with reduced friction, and method for treating a glass cylinder for a piston-cylinder assembly

A method of treating a glass cylinder for a piston-cylinder arrangement for reducing the friction of a piston on an inner cylinder wall of the glass cylinder, the method comprising:

• elevating surface energy of glass of an interior bounded by the inner cylinder wall and hence lowering a contact angle of the glass with water, wherein the contact angle is lowered by:
• a gas discharge that acts on the glass at the inner cylinder wall and is generated by an electric or electromagnetic field;
• or
• the action of ozone on the glass surface;
• contacting the glass with the lowered contact angle with water vapor to form a water film on the glass;
• and
• placing a piston in the interior such that the formed water film is disposed between the piston and the glass.