Choosing temporary blonde dyes can depend on several factors, such as the desired duration, ease of application, and color intensity. Here I present two popular options that are known for their effectiveness and temporary results:
1. L’Oreal Paris Colorista Temporary Hair Spray: temporary blonde dyes

Durability: This temporary spray offers temporary color that can be easily washed out after one or two washes, making it ideal for temporarily changing your look.
Ease of Application: It comes in a spray-type container that facilitates application, allowing uniform color distribution.
Variety of Shades: L’Oreal Paris Colorista offers a variety of temporary blonde shades to suit different preferences.
Instant Effect: Provides an instant color change without the need for long-term commitments.
2. Clairol Color Crave Temporary Hair Mousse:

Long Lasting: Clairol Color Crave offers temporary hair color that typically lasts up to a week, providing longer wear compared to some temporary products.
Ease of Application: It comes in the form of a mousse, which makes it easier to apply and distribute, allowing for more uniform coverage.
Ammonia-Free Formula: The ammonia-free formula is gentler on the hair and scalp, making it a more forgiving option for those looking to avoid harsh chemicals.
Variety of Shades: Clairol Color Crave also offers a range of temporary blonde shades to suit different styles.
Tips for Application:
Hair Preparation: Wash and dry your hair well before applying the temporary dye. Make sure it is completely dry for best color adhesion.
Clothing Protection: Use a towel or cape to protect your clothing and skin during application.
Proper Distance: When applying sprays or mousses, maintain an appropriate distance to achieve uniform application.
Combing and Distribution: Comb the hair to ensure even color distribution. Apply the product consistently from roots to ends.
Drying: Allow product to dry completely before touching or styling hair.