**Instructions:**
1. **Prepare the Mixture:**
- In a non-metallic bowl, combine Nouvelle Decoflash Bleach with a developer using the suggested mixing ratio of 1 part bleach to 2 parts developer.
2. **Mix Thoroughly:**
- Stir the mixture thoroughly until a smooth and consistent paste is achieved. Ensure there are no lumps in the mixture.
3. **Application:**
- Wear suitable gloves to protect your hands. Apply the bleach mixture evenly to dry and unwashed hair using a brush or applicator. Begin application from the tips and work towards the roots.
4. **Processing Time:**
- Monitor the hair's lightening process during the application. The processing time may vary based on the desired level of lightening and the hair's starting color. Check the color development regularly.
5. **Check Periodically:**
- Periodically check strands to determine the level of lightening. Rinse when the desired level is achieved.
6. **Rinse Thoroughly:**
- Once the desired lightening is achieved, rinse the hair thoroughly with lukewarm water. Shampoo and condition the hair to ensure the removal of any residual bleach.
7. **Post-Treatment Care:**
- Apply a nourishing conditioner or treatment to replenish moisture and maintain the health of the hair.
8. **Style as Desired:**
- After the hair has dried, style it as desired. Use heat styling tools with caution, and consider applying a heat protectant for added care.
Note: Always follow the manufacturer's instructions on the bleach and developer packaging. Perform a strand test before full application to assess the result and check for any potential allergic reactions. Use in a well-ventilated area and avoid contact with eyes. If irritation occurs, discontinue use and seek medical attention.
Achieve professional-grade results with Nouvelle Decoflash Bleach 500gm - Refill (BLUE) by following these step-by-step instructions for a safe and effective hair lightening experience.