So you’ve heard of/experienced shock curing, aka “blooming” with your lash glue (turning white)?
You would only get blooming if the glue is still “wet” when water, tears, or extremely high humidity (this is much rarer) touches it. If this occurs during your lashing, it’s most likely from the client’s tears… which means that fumes may have gotten into their eyes, or your gel eyepads have leaked into their eyes!
To prevent this from occurring at the end of your session – make sure to fan dry for a couple of minutes before nano-misting (regardless of your humidity level). Misting is highly recommended. Your client will get relief from the refreshing mist, and your glue will cure better and quicker.
The “real” reason to advise your clients not to get their lashes wet in the first few hours is not because of glue curing issues, but more to make sure that the clients aren’t being too rough with their lashes during this time when full strength (from glue polymerisation) is yet to be achieved. Otherwise, they can get them wet without issues (if you’ve mist). The glue will continue to strengthen over the next couple of hours after leaving your salon.
BTW, the chemistry term for this shock curing is “efflorescence” (means “to bloom” in French) – spontaneous loss of water by a hydrated salt, which occurs when the aqueous vapor pressure of the hydrate is greater than the partial pressure of the water vapour in the air.
So the white powdery substance you see is the salt left behind (from the water/tears that was spontaneously reacting with the cyanoacrylate).
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Photo by: Candymax