new test tubes

Test tubes with groove

Test tubes with a grooved rim enable the compensation of excess pressure, without opening the cap. Therefore, caps, that are similar to freeze-drying stoppers, are used. These allow air to escape from the inside of the tubes, through the groove on the rim. The hotshaped groove doesn‘t have sharp edges and allows safe handling.

Materials

• Soda-lime glass (e.g. AR©)
• Borosilicate glass (e.g. DURAN©, PYREX©, SIMAX©)
• Neutral glass (e.g. FIOLAX© and DUROBAX©)
• Aluminium silicate glass (e.g. Schott 8252/8253)
• Quartz glass (naturally melted quartz glass and synthetically produced quartz glass, incl. F300)

Process of Production

• Hot forming

Dimensions

• Diameter: 4 - 30 mm
• Lengths: 30 - 300 mm
• Wall thicknesses: 0,6 - 1,8 mm

Design

• With groove
• With hole

Geometries

• Round

Advantages

• Direct ventilation