Us906: upon initial inspection no abnormalities could be noted with the dots.A 3m lead check test was utilized on a sample of the dots to confirm that these dots were manufactured with lead-based ink.Dots from lots 1508 - 1605 were manufactured with a different formulation, non-lead based, and had similar reports of color reversion.It was confirmed that these dots were manufactured with the correct lead-based formulation.It was also noted that while the color change of the dots had a variance from grey to black, a color transition had occurred from the signal color.Per internal procedures a batch record review was performed due to the absence of lot number reporting, and no abnormalities or non conformances were noted during this comprehensive review.Note: a retrospective review of potential serious injury complaints was performed.This mdr was identified as a reportable malfunction as a result and filed as part of the review activities.
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