Haircare
Always Test First: How to Check Beauty Products, Hairwash and Colour Washes Before Using Them
Before you commit to any new beauty product — whether it is a shampoo, a colour wash or a skincare serum — a quick test could save you from a bad reaction, unexpected results or a hair colour you did not bargain for. Testing takes a few minutes and makes all the difference.
Patch Testing Beauty Products
A patch test checks whether your skin reacts badly to a new product before you apply it all over. It is essential for anything that goes on your face or scalp, including shampoos, conditioners, serums, hair dyes and tinting treatments.
Apply a small amount of the product to the inside of your elbow or behind your ear. Leave it on for 24 hours without washing it off. If you notice redness, itching, swelling or any irritation, do not use the product on your hair or face. If the area looks calm and feels normal, you are likely fine to go ahead.
Even if you have used a product before, patch test again if the formula has changed or if your skin has become more sensitive. Hormones, medication and seasonal changes can all affect how your skin responds.
Testing a New Hairwash or Shampoo
A new shampoo can change how your hair looks and feels, sometimes in ways you were not expecting. Before switching fully, do a trial wash on one section of hair or just the back of your head.
Note how your scalp feels during and after. A good shampoo should clean without leaving your scalp tight, itchy or overly dry. Your hair should feel clean and manageable, not stripped or coated. If it lathers unusually heavily or barely at all, that is worth paying attention to on the first wash.
Give any new shampoo two or three washes before you decide. Hair takes a short adjustment period when switching formulas, especially if you are moving from a silicone-heavy product to a silicone-free one. Initial dullness or slight heaviness in the first wash or two is normal.
Testing Colour Washes and Toning Treatments
Colour washes, purple toners, colour-depositing conditioners and colour rinses can look very different on your hair than they do in the bottle or in promotional photos. Always do a strand test before applying to your whole head.
Cut a small piece of hair from an area that is not visible — the nape of the neck is perfect. Apply the colour wash exactly as the instructions say and leave it on for the recommended time. Rinse and let it dry completely before you judge the result. This shows you the actual colour deposit on your specific hair, which varies depending on your starting shade, porosity and previous chemical treatments.
If you want more or less colour intensity, adjust the timing on your strand test rather than your whole head. Leave it on for longer for a deeper result or rinse sooner for something more subtle. Once you find the timing that works, you can apply it with confidence.
Purple and silver toners in particular are worth strand testing carefully. On very light or porous hair they can deposit quickly and turn hair lavender or grey rather than just cooling down brassiness. A strand test tells you exactly how long to leave the product on your hair to get the result you are after.
Keep a Simple Record
Once you find a timing or method that works, write it down. Note the product name, how long you left it on, the result you got and how your hair or skin felt afterwards. This is especially useful for colour washes, where the timing is everything. You will not have to guess or retest every time you use it.
Testing takes almost no extra effort but gives you the confidence to try new products without the risk of a surprise. A few minutes before you start can make the difference between a result you love and one you have to live with until it grows out.