Final answer:
The undertone of a client's skin should be assessed on the neck, as it offers a consistent representation of the true undertone, unaffected by skin discolorations or blemishes that may appear on the face or hands.
Step-by-step explanation:
The undertone on a client's skin should be found on the neck. Finding the correct undertone of a client's skin is essential in various industries, especially in beauty and fashion. The undertone is the color that is underneath the surface of the skin, which affects the overall hue. There are generally three types of undertones: warm, cool, and neutral.
When determining a person's undertone, it is advised to look at the neck area because it is less likely to be affected by skin discolorations, blemishes, or uneven skin tone that can be present on the face. The neck's skin, being less exposed to the sun and other elements compared to the face or hands, provides a more consistent and true representation of the undertone. Moreover, the makeup industry often recommends matching foundation to the neck to ensure a seamless blend between the face and body, avoiding a visible line of demarcation.
Assessing the skin in the absence of direct sunlight, under white light, can further help in identifying the true undertone. Jewelers often use this method when selecting precious stones that will complement the customer's skin; makeup artists apply similar principles when choosing the right makeup palette. It is important to not confuse surface tones, which can change with sun exposure or certain skin conditions, with undertones that remain consistent.