30 Vol Bleach. I recommend not using 30 volume on your scalp, or if you need to bleach your scalp, but continue using 20 vol or less, 30 volume can do some damage to your scalp if left on for too long, like the damaging your hair follicles so they don't grow back hair kind of damage. I developed a fully organic technique to getting rid of one hundred% of common anxiety and panic attacks. 4. 4 out of 5 stars. 99 (£10. 16/100 ml) ideal for bleaching beginners who only want highlights or ombré hair.
A 20 volume hair developer is quite standard. It’s relatively safe and could stay in longer. From 20 to 40 minutes, it can lift the hair two to three tones lighter. It’s not entirely strong and could use another application so don’t leave the hair in too long expecting better results. Use a good quality bleach, and get ready your 20 or 30 vol developer. Use 30 vol when you need to lift by 3 levels or more. Use 2 parts of developer to 1 part of bleach. Apply on dry, unwashed hair. Take your bleach powder and 30 volume developer and mix them in a bowl with a good ratio.