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9 Function tests
43
3.
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Bowie & Dick test
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Evaluation of the indicator following the colour change
Depending on the manufacturer batch, treatment indicator strips often exhibit differing intensities in the col-
our change resulting from different lengths of storage or other influences. Of crucial importance for evalu-
ating the Bowie & Dick test is not the strength of contrast in the colour change on the test sheet, but its
even nature. If the treatment strips/treatment indicator sheet indicates an equal distribution of colour
change, the air removal of the sterilization chamber is without fault. If the treatment indicator strips or the
treatment indicator sheets are uncoloured or exhibit less colour in the centre of the star in comparison to
the end, air removal was insufficient. In such a case, please consult the stockist customer services/author-
ized customer services.