1/ If it’s dip dyed they used something idye poly and it smells like formaldehyde when heated
2/ Don’t strain yourself trying to straightening it: go for the higest setting on your iron (or notch it up little by little until you find what doesn’t burn). That’s a temperature of 200° Celcius on my iron (329° Fahrenheit)
3/ This applies to braiding kanekalon for human braids only! Glow in the dark kanekalon, Toyokalon, doll grade kanekalon and poly types will frazzle so always test the hair end before starting in the middle! Reminder that saran takes upto 120°C & no more.
4/ glue solidily into the head and wait a full 48 hours or it can come out while brushing or just moving the head.