Contour paste and mapping string are essential tools used in the process of eyebrow mapping, a technique that helps create symmetrical and well-shaped eyebrows.

Contour paste, also known as brow mapping paste, is a colored creamy substance used to sketch the desired shape of the eyebrows before the permanent makeup procedure. It's applied with a brush along the contour of the desired eyebrow shape, leaving the eyebrow itself and the skin areas that need to be tinted empty. This paste works as a barrier, highlighting the contour around the eyebrows and lips, and protecting the skin from the effects of pigmentation paints. Some contour pastes even contain nourishing ingredients like Aloe Vera, which can soothe and hydrate the skin before treatments like waxing, tweezing, or threading.

Mapping string, on the other hand, is used to create precise lines and measurements on the face to guide the shaping of the eyebrows. The string is typically pre-inked with hypoallergenic cosmetic grade pigment, which leaves thin but well-seen marks on the skin. This method is highly precise and technical, leaving less room for error when trying to achieve symmetry.

These permanent makeup supplies are used together to create a clear and precise outline of the desired eyebrow shape. After the outline is created with the mapping string, the contour paste can be used to fill in the outline and create a clear visual of the final eyebrow shape. This allows both the artist and the client to see the planned shape before any permanent work is done, ensuring that the final result will be symmetrical and harmonious.

These permanent makeup accessories are popular among both beginners and experienced professionals in the field of permanent makeup and microblading. They are widely available in various brow mapping kits, which often also include other tools like brushes and eyebrow rulers.