Mehndi, also known as henna, has become a popular temporary tattoo option that can be applied to the skin for any occasion. One concern that many people have is how to make the mehndi look darker and last longer. While there are many factors that can affect the final outcome, there are several tips and tricks that can help ensure a rich and long-lasting stain. From the best time to apply the paste to the type of mehndi used, these techniques can make a significant difference in the final appearance of the design.