High Bright Pre Treatment Vs Blondage Shampoo: Which Wins?

The High Bright pre treatment and the Blondage purple shampoo look similar on the shelf but solve opposite problems. Here is when to reach for each one.
| Factor | Redken Blondage High Bright Pre Treatmen | Redken Blondage Purple Shampoo, 10.1 fl |
|---|---|---|
| Purpose | Remove dull buildup | Neutralize yellow tones |
| Key ingredient | Vitamin C complex | Violet pigment |
| How used | Pre shampoo leave in | Shampoo 2 to 3x weekly |
| Tones brass | No | Yes |
| Brightens dullness | Yes | No |
| Best for | Dark matte blonde | Yellow brassy blonde |
Our Verdict
Buy the High Bright Pre Treatment if your blonde looks dull, dark, or coated. Only it removes the buildup causing the problem. Buy the Blondage purple shampoo if your blonde looks yellow or brassy. Most blondes eventually need both, used on alternating washes.
More Top Picks in This Category
Not sold on either of these two? Here are more bestselling options worth considering.

Best for: Best value for regular purple shampoo users.
Redken Blondage Purple Shampoo, 33.8 fl oz
- Liter size bottle
- Same violet formula
- Salon staple
Pros
- Low cost per ounce
- Lasts for months
- Consistent toning
Cons
- Big upfront cost
- Bulky bottle

Best for: Toning plus moisture in one step.
Redken Blondage Purple Conditioner, 33.8 fl oz
- Violet pigments
- Moisturizing formula
- Liter size
Pros
- Tones while conditioning
- Great for dry blonde
- Long lasting bottle
Cons
- Heavy for fine hair
- Premium price

Best for: Complete toning routine in one purchase.
Redken Blondage Shampoo and Conditioner Set
- 10.1 oz shampoo plus conditioner
- Violet pigment system
- Matched pair
Pros
- Balanced toning routine
- Good starter set
- Trusted brand
Cons
- Smaller bottles
- Costs more than shampoo alone
Want the Full Picture?
Dull vs Brassy: The Diagnostic Nobody Teaches
The most useful distinction in blonde maintenance is the one no guide teaches: dullness and brassiness are different problems with opposite fixes. Brassiness is yellow or orange tones from underlying pigment showing through, and purple shampoo neutralizes it. Dullness is a coated, matte, darkened look from product buildup, minerals, or pollution sitting on the hair, and purple shampoo cannot fix it; layering violet pigment over buildup just makes dull hair darker.
This is exactly the fork this page's two products address. The High Bright pre-treatment with vitamin C removes the dullness-causing buildup, while the Blondage shampoo neutralizes the brass. If your blonde looks dark and coated, reach for the pre-treatment first; if it looks yellow and bright, reach for the purple shampoo. Using the wrong one wastes weeks, which is why the "purple shampoo stopped working" complaint so often turns out to be a dullness problem in disguise.
Hard Water: Chelate First, Tone Second
One competitor table row mentions hard water, but nobody gives the full routine, so here it is. Mineral buildup from calcium and magnesium is the most common cause of dull blonde that resists purple shampoo. The minerals form a film that blocks violet pigment from depositing, so toning washes do nothing until the film is gone. The sequence that works: chelating or clarifying pre-treatment first, like the High Bright formula's vitamin C complex which targets dull buildup, then purple shampoo on the clean slate.
In hard water areas, make the pre-treatment a biweekly habit rather than an emergency fix. You will know it is working when your purple shampoo suddenly "works again" after weeks of doing nothing. A showerhead filter is the long-term answer, but the chelate-then-tone sequence handles the problem with products alone. Our best purple shampoo guide on tone, brighten, and maintain covers how to fold this into a weekly routine.
"Purple Shampoo Made My Hair Darker": The Recovery Plan
The darkening complaint gets no recovery plan anywhere, so here is one. Over-toning happens when strong pigment like Blondage's is used too often or left on too long, and the violet accumulates until blonde looks smoky or gray. Recovery takes one to three clarifying washes: use a plain clarifying shampoo, lather well, leave it two minutes, rinse, and repeat. Each wash strips a layer of excess violet without touching your underlying color.
Do not follow clarifying with purple shampoo in the same wash; that defeats the purpose. Once brightness returns, restart toning at half the previous frequency, or switch to the conditioner format for gentler maintenance. Prevention beats recovery: set a timer for contact time, and when in doubt, rinse early. Our blonde toning mask guide for fixing yellow brassiness at home shows how mask formats give more controlled deposit than shampoos.
Transitioning Off Purple Shampoo
Growing out color or returning to warm tones requires weaning off, and nobody covers the transition weeks. Going cold turkey leaves a visible line where toning stops, especially on previously bright blonde. The taper: stretch purple shampoo from twice weekly to once weekly for a month, then biweekly, then stop, letting the tone warm gradually and evenly.
During the transition, expect the hair to look progressively warmer, which is the goal, not a failure. If brass arrives faster than you want during the wean, hold at the once-weekly level longer rather than quitting and restarting; the stop-start cycle causes more uneven tone than a slow taper. For a gentler toning philosophy during transitions, our Aveda purple guide on toning blonde hair without brassiness offers a softer approach.