Composed of a single proton and a single electron, hydrogen is the simplest and most abundant element in the universe. It is estimated that 90% of the visible universe is composed of hydrogen. Hydrogen is the raw fuel that most stars 'burn' to produce energy. The same process, known as fusion, is being studied as a possible power source for use on earth. The sun's supply of hydrogen is expected to last another 5 billion years. Hydrogen is a commercially important element.
Eau de toilette is a lightly scented cologne used as a skin freshener. The term toilette/toilet used in this context describes the process of washing and personal grooming. Eau de toilette is also referred to as aromatic waters and has a high alcohol content.
An Eau de Parfum is 'The next one up' from an Eau de Toilette. They are useful for men, who find that their fragrance doesn't last or just would like a stronger strength. They contain 8%-15% of the perfume oil, and these can last pretty much all day.The Eau de Parfum is fairly rare in Men's fragrance, but not as rare as the pure perfume.f you are wanting a lasting fragrance, go for the EDT. Many men like Aftershave to put on after they have shaved & then spray on a little EDT. It is mostly up to you as to what you perfer to use. As well as Aftershaves, Eau de Toilettes and Eau de Colognes, there are two other main fragrance strength categories.