Using hair bleaching powder requires careful steps and precautions to ensure safe and effective results. Here's a general guide on how to use hair bleaching powder:

1. Preparation:

• Always do a patch test 48 hours before full application to check for any allergic reactions.
• Wear gloves to protect your hands from chemicals.
• Protect your clothes and surrounding area from potential stains with a cape or old towels.
• Ensure your hair is clean and dry. Don't apply bleach to freshly washed hair as the natural oils can help protect your scalp during the process.
• If you have long hair, consider sectioning it off to ensure even application.

1. Mixing the Bleach:

• Follow the instructions on the packaging regarding the ratio of bleach powder to developer. Generally, a 1:1 or 1:2 ratio (bleach:developer) is common but always refer to the specific product directions.
• In a non-metallic bowl, mix the bleach powder and developer until you get a smooth consistency similar to thick yogurt.

1. Application:

• Start applying the bleach mixture to the sections of hair you wish to lighten, starting at the ends and working your way up to the roots. Roots tend to lift faster due to the warmth of the scalp, so leaving them for last can prevent over-processing.
• Use a tinting brush to evenly distribute the bleach and avoid contact with your scalp to minimize irritation.
• For best results, work quickly but thoroughly.

1. Processing Time:

• Check the progress periodically. The processing time varies depending on the desired level of lightening and the condition of your hair. Typically, it ranges from 15 to 45 minutes but never exceed the maximum recommended time on the product label.
• Be cautious not to leave the bleach on for too long, as this can cause severe damage to your hair.

1. Rinsing and Conditioning:

• When you reach the desired lightness, rinse the bleach out thoroughly with lukewarm water until the water runs clear.
• Shampoo your hair with a mild, clarifying shampoo to remove any remaining residue.
• Apply a deep conditioning treatment or protein mask to restore moisture and strength to your hair after bleaching.

Remember, bleaching can be very damaging to your hair. Always consult with a professional stylist if you're new to the process or unsure about anything. Also, don't bleach hair that is already damaged or overly processed.