“Double dipping” is a term that all professional makeup artists and beauty professionals should be aware of. It means reloading the same product by dipping the applicator into the container more than once and reapplying.

Think about a mascara wand when you have loaded it with product, applied it to the top lashes and then put it back into the tube of mascara and then apply mascara to your client’s bottom lashes or continue to build on the top lashes.  The bacteria that live in all our lashes will have transferred from the first application of mascara into the tube and on to the mascara wand.  The product in the tube is now contaminated and so is the applicator.  So unless it is a new tube of mascara which you intend to give to that one client, your brush and mascara should not be used on another person.  Often makeup artists think that using one disposable per client is OK!  The moment the disposable mascara wand is reloaded into the product, then the cross-contamination has taken place and you might have well as used the original brush that came with the product.  Remember, one dip, one application and into the bin.