How to form fans for long retention
         Why is it important to develop in the lash industry
    How does the treatment of natural eyelashes affect the retention
     How does the setting of the fan affect the retention
       What is an eyelash retention and what should it be
    Physiological factors and features affecting the retention of eyelashes
    Working conditions of glue for high-quality retention
    Rules for working with glue
    Which products are better to use and when: booster, primer, cleanser and activator
    How to choose the right glue for your region and climate features
     Possible ways of development