This difference in shelf life is due to the types and strengths of the chemicals involved. Once opened, if stored properly, you can keep hair dye for up to a year. However, some manufacturers suggest using hair dye within 6 weeks of opening for the best results.
First, look at the packaging or bottle. If the box or bottle is swollen, wet, leaking, dented, or otherwise damaged, throw it out. These could be signs of oxidation, suggesting that the chemical composition may have changed. Another possibility is the contamination of the product by bacteria or fungi.
A yellow or orange color around the lid means air got in. Toss it. Any major color changes to the dye or developer are another giveaway. Expired dye will often appear separated or milky rather than smooth. Expired developer may be extra liquidy or have a yellowish tint. If you noticed a sour or spoiled smell when you opened the dye, this is another sign of unwanted bacteria.
Using expired hair dye or developer can result in a range of effects, from simply wasting your time to requiring a call to your salon or doctor ASAP.
You may end up spending more time or money than if you just bought new products from the beginning. If it does work, you might get a slightly darker shade than intended. Other possibilities are uneven color, greenish hues, or color that fades very quickly. Expired dye or developer could also lead to damaged, frizzy hair.
Other possibilities include allergic reactions or burns to your scalp. Hair developer which has gone out of date can cause damage to your hair leaving your lovely locks brittle and dry which can lead to breakage.
The hair follicle can be damaged to the point that the result is hair loss. The skin that makes up your scalp is sensitive and can become easily irritated, in particular when chemicals like hydrogen peroxide are involved. Chemicals that have passed their expiration date can exacerbate this sensitive skin further, leading to scabbing and itching. Itching means you will be compelled to scratch that itch.
This can damage the skin and produce bacteria which may result in a bacterial infection on your scalp. In this event, seek advice from a medical professional who should be able to advise you on the matter. Developers can vary in their ingredients and their volume strength.
This means that not all hair or scalps will react in the same way to the different products out there. Easy Ways To Fix. If the worst has happened and you have already used the expired hair developer, there are a few things you can try to reduce the extent of the damage:.
Even if you are in the middle of dying your hair, and you have realized that the developer you have mixed with the dye has expired, you need to stop the process immediately and get rinsing. Avoid, avoid, avoid! The expired hair developer will possibly have made your hair very dry and brittle. Using heat tools will add to the damage of the weakened hair and possibly cause breakage.
Use nourishing products on your hair to replenish it and restore the lost moisture. Hair masks and deep conditioners are good for this. You should closely follow the instructions that come with the product.
But as a very general rule of thumb, the mixture of developer and hair dye should not stay on your head for more than 1 hour. Yes, it does! Since developer contains the ingredient hydrogen peroxide, it needs to be kept away from direct sunlight.
Nonetheless, a developer can expire. Not by going bad or stale, but they deteriorate. The hydrogen peroxide present in the developer breaks down to free oxygen and water.
Once the developer is opened, exposure to the atmosphere has begun and you can only use the remaining product for the next six months. To avoid using it past that, always jot down the day you opened and the expected expiry date to be aware of the state of the developer. But if unopened, the bottle can last you three years as long as it is kept in ideal storage conditions.
These are;. Inside a closet, cupboard, or drawer would be the best place to store the bottle. Ideally, you can also write the date of purchase so you know when three years are about to lapse. The composition of a developer is hydrogen peroxide H2O2. Chemically speaking, more oxygen has been introduced to water to form the compound. When you add the developer to your desired hue, the mixture becomes alkaline, and decomposition starts.
0コメント