Does Purple Shampoo Stain Glass When It’s Left On Too Long?

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Purple shampoo is a popular hair product that neutralizes brassy/yellow tones and enhances cool blonde colors. If you use purple color-toning shampoo, you may have experienced a purple haze or streaky residue from the pigment in your shower. But will it stain or discolor surfaces if it’s left sitting there too long?

Purple shampoo may stain glass if left on too long, depending on the ingredients and the type of glass. You should rinse spills off immediately-the longer the shampoo sits, the more likely it will stain. If it stains, use vinegar, lemon juice, or a Magic Eraser to remove it after testing an inconspicuous area.

Let’s take a closer look at when purple shampoo can stain glass and the best way to remove it if you get it on your shower or bathroom windows. We’ll also go over how to prevent purple staining and tips on using shampoo effectively.

Does Purple Shampoo Stain Glass?

Woman in shower applying purple color toner

The short answer is yes, purple shampoos may stain glass if it’s left to sit for too long. Depending on the type of pigment the shampoo contains, it’s possible for it to penetrate or adhere to certain surfaces, including glass.

Three pigments are used in purple shampoo: organic, inorganic, and metallic. 

Organic pigments are derived from natural sources, such as vegetables or minerals. Inorganic pigments are synthesized in a lab, while metallic pigments are made from metals, such as iron oxide.

Each type of pigment has distinct properties, and the composition of purple shampoo can vary depending on the brand. But all three colorants used in purple shampoo might stain if not washed off properly.

How to Remove Purple Shampoo Stains From Glass

If you have a stubborn purple shampoo stain on your glass shower door, the good news is that purple shampoo doesn’t have the same level of pigmentation as hair dye. The stains are therefore easier to remove than it may seem.

Here are a few methods you can use to remove purple shampoo stains from your glass shower door:

Peroxide and Baking Soda

Make a paste by combining two parts baking soda and one part hydrogen peroxide (on Amazon). Then, spread the paste onto the area and let it sit for 15 to 20 minutes to help dissolve the dye and lift the stain.

Once the paste has set, dampen a sponge or soft cloth with peroxide to scrub away the residue.

White Distilled Vinegar or Lemon Juice

White vinegar and lemon juice are both acidic and can help break down tough stains. To use, saturate a cloth or sponge with either vinegar or lemon juice and wet the stain. 

Allow it to sit for 15 minutes before gently scrubbing the area with the cloth.

Melamine Foam Sponge

Also known as a Magic Eraser (on Amazon), this sponge becomes slightly abrasive once wet and can help remove stubborn stains. Test the sponge on an inconspicuous section of your glass door to make sure it doesn’t scratch the surface before you attempt to scrub away the stain.

When you’re certain it’s safe to use, dampen the sponge with water and gently scrub away the purple shampoo stain. Repeat as necessary until you’ve removed all the residue from your glass door.

Diluted Bleach

If other methods don’t work, you may need bleach to remove the stain. Bleach is a powerful cleaning agent, so ensure the room is well-ventilated and wear gloves and eye protection.

Dilute the bleach by mixing one part with one part water, then dampen a sponge with the solution and scrub the area until it is clean. Wipe away any remaining residue with a cloth soaked in warm water and thoroughly rinse the area with warm water to remove any traces of bleach.

How to Prevent Purple Shampoo Stains

Close up of woman holding small container of purple hair toner

Now that you know how to remove any purple shampoo stains from your glass shower door, let’s look at how to avoid them in the future.

The best way to prevent purple shampoo stains is to clean the area immediately after washing your hair. After you’ve rinsed the shampoo, rinse away any splatters or residue before getting out of the shower so it won’t have time set.

Other ways to prevent purple shampoo stains include:

  • Using the right amount of shampoo: Too much can lead to splatters as you rinse it out. Use just enough to cover your head and rinse with minimal agitation.
  • Take your time: Always take your time to distribute the shampoo evenly, then rinse it out slowly.
  • Tilting the shower head: To minimize splashes, tilt the shower head slightly downwards so that water runs down instead of spraying out.

These simple steps should help prevent purple shampoo stains and keep your glass shower door stain-free.

Tips for Using Purple Shampoo

Now that you know how to remove and prevent purple shampoo stains, here are a few tips for getting the most out of your purple shampoo:

  • If you’re new to purple shampoo, use it once or twice weekly and increase as needed. The color may become too intense and stain your hair if you overdo it.
  • Even though it may be tempting to leave the shampoo on longer, doings so can dry out your hair and scalp because some ingredients, such as sulfates and alcohols, are harsh if left on for too long. Limit your use to 2-3 minutes, or whatever the label recommends.
  • If you want a purple product to leave in, opt for a conditioner or mask instead. These products are intended to be left on for an extended time and contain more hydrating ingredients.
  • Always read the label carefully and follow the directions as recommended to ensure that you get the best results from your purple shampoo.

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