When it comes to hair dye, the waiting time can be a bit of a mystery. You've got your dye on, and now you're just sitting there, twiddling your thumbs, waiting for the magic to happen. But, why is it that some dyes need to be left on for 20 minutes, while others need a whopping 45 minutes - what's the big deal?
The thing is, hair dye is like a special delivery for your hair - it needs time to penetrate the hair shaft and do its thing. And, just like how a good coffee needs time to brew, hair dye needs time to develop. But, if you leave it on for too long, it can be like overcooking your hair - not good!
