SMTL offer dry penetration testing. Dry penetration testing is required as part of 13795 for the testing of gowns & drapes

Dry Penetration Apparatus

 

Talc contaminated with spores is poured onto the test piece inside a container.  The platform supporting the container is vibrated by a pneumatic ball vibrator. Any talc that has penetrated through will be captured on an agar plate. The agar plate is incubated, and the total number of colonies on the surface the plate are counted.

The mean bacterial count is calculated and compliance with the performance requirements determined.

 

 

 

 

Relevant Standards

  • BS EN ISO 22612
  • BS EN 13795

Further Test Information

In this test, a portion of talc contaminated with a known number of Bacillus subtilis (B. atrophaeus) spores are poured onto the test piece inside a container. A container without the contaminated talc is used as the control.  An agar plate is inserted into the base of the container below the test piece. The platform supporting the container is vibrated for 30 minutes by a pneumatic ball vibrator. Any talc that has penetrated through the test piece will be captured by the agar plate. The agar plate is then removed and incubated for 24 hours at 35°C and the total number of colonies on the surface the plate are counted.

The mean bacterial count is calculated and compliance with the performance requirements determined.

 

For further information, or a quotation, please contact: biological@smtl.co.uk

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