Abstract: A process for the production of an aerogel material comprises the following steps: a) preparation of a silicon oxide sol in an alcoholic solvent mixture; b) triggering of the gelation of the sol by adding base, whereby a gel is formed, and optionally aging of the gel; c) hydrophobicization of the optionally aged gel; d) removal of the solvent mixture by subcritical drying, whereby the aerogel material is formed. The silicon oxide sol formed in step a) comprises at least one acid-catalytically activatable hydrophobicization agent, wherein the volume fraction of the hydrophobicization agent in the sol is 5 to 60%. The hydrophobicization in step c) is induced as a result of release or addition of at least one hydrophobicization catalyst acting in combination with the hydrophobicization agent.

Abstract: A tamper-resistant indicator is disclosed. The indicator includes a front panel configured to be located on an outside surface of a door. The indicator also includes a back panel configured to be located on an inside surface of the door. The indicator also includes a turning indicator, including a springy living hinge, wherein said turning indicator has a front part disposed on the front panel and a back part disposed on the back panel, and the two parts communicate with each other via a rotatable axis or shaft member configured to pass through an opening bored through the door, and wherein the axis or shaft member is coupled between the front and back parts of the indicator, such that rotation of the back part of the indicator rotates the axis or shaft member, which in turn rotates the front part of the indicator.

Abstract: A tamper-resistant indicator is disclosed. The indicator includes a front panel configured to be located on an outside surface of a door. The indicator also includes a back panel configured to be located on an inside surface of the door. The indicator also includes a turning indicator, including a springy living hinge, wherein said turning indicator has a front part disposed on the front panel and a back part disposed on the back panel, and the two parts communicate with each other via a rotatable axis or shaft member configured to pass through an opening bored through the door, and wherein the axis or shaft member is coupled between the front and back parts of the indicator, such that rotation of the back part of the indicator rotates the axis or shaft member, which in turn rotates the front part of the indicator.