lash tips and info
I specialise in lash extensions and hope to inspire many of you established or aspiring lash techs out there with my useful tips and information...
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Have you ever felt frustrated when clients come back and report of a major loss of lashes despite following your aftercare? Do you find yourself changing your lash adhesive or lash supplier often in the hope that this issue will be resolved but you find there is no difference in client retention?
It’s important for lash technicians to understand why controlling humidity and temperature is extremely important for your adhesive to perform as it should.
As we know, eyelash glue is a Cyanoacrylate based adhesive. Cyanoacrylates adhesives have a short- shelf life. Once opened they need to be used within 3 months if not sooner! Every time the bottle is opened the glue is exposed to moisture in the air. H20 (water) blinds to C6H7NO2 (Ethyl cyanoacrylate) causing it to cure faster. Remember that it’s good practice to date the bottle as soon as you open it. I replace my glue every 3-4 weeks.
Just to help you understand how the glue works better, let's take a look at this Wikipedia definition:
“In general, cyanoacrylate is an acrylic resin that rapidly polymerises in the presence of water (specifically hydroxide ions), forming long, strong chains, joining the bonded surfaces together. Because the presence of moisture causes the glue to set, exposure to normal levels of humidity in the air causes a thin skin to start to form within seconds, which very greatly slows the reaction. Because of this cyanoacrylate is applied thinly, to ensure that the reaction proceeds rapidly and a strong bond is formed within a reasonable time.”
To help you determine the humidity and temperature of your treatment room, you can buy a Hygrometer cheaply online. If you find your glue is gloopy and forms a thick layer on the top it's probably too humid. Knowing how to control your humidity as well your temperature is crucial.
REMEMBER optimal humidity/temperature may vary for different lash adhesives so always check your manufacture's instructions. It is agreed across the lash industry that the best atmospheric conditions for good, reliable bonds are:
Optimal relative humidity between 45-55%
Optimal temperature between 20 and 24°C
The higher the relative humidity is, the faster the product cures. If humidity is too low (< 30%) setting time can become very slow; if humidity is too high (>70%) a so-called shock polymerization takes place. This provokes a certain shrinking process of the adhesive layer, which leads to less bond strength which in turn results in poor lash retention!
Temperature influences the time of the chemical reaction very much. Generally it can be said that a 10°C hike in temperature results in twice as fast polymerization time.
To decrease Humidity in your treatment room:
Buy a dehumidifier! Now yes there are cheap ones out there but I think it's wise to invest in a good quality one which you will use for the rest of your lash career.
Honeywell Dehumidifier 10L:
£159.99 from Argos
To increase Humidity in your treatment room:
Simply place a bowl filled with water in the room as close to the center of the room as possible
To increase or decrease Temperature in your treatment room
A heater and fan will help! Getting the two in one is great!
Dyson Hot+Cool Fan Heater
£249.99 from Curry's
To help increase the shelf life of your glue you can: