Why is dye colored

As I said, I personally use them to mean the same thing. Thank you! English but my first language was German. They mean the same, but: She dyes her hair is probably a criticism. She colors her hair is neutral. Edinburgher Senior Member Scotland.

I think they're mostly synonymous, but a technical distinction could be made in which coloured would be the more general term meaning that the hair has been given a particular colour while dyeing specifically means that pigment is added, and bleaching is the process of taking pigment out.

In this sense dyeing and bleaching are both colouring, but colouring is not necessarily achieved by dyeing. Sparky Malarky Moderator Indiana. Manufacturers started using the verb "color hair" and the noun "hair color" because they thought it would sell better than "dye. Dye is permanent. There are a number of products that are temporary they go away when you wash your hair or semi-permanent they go away when you wash your hair a number of times. A number of chemicals are combined with the dye to color the aluminum.

The technical expertise and high levels of quality we have achieved as a result of our long experience with dyes allow us to handle even seemingly difficult materials such as aluminum. Stationery dyes are mainly used in oil-based ballpoint pens and highlighters. Because we offer reliable quality and a full lineup of colors ranging from yellow to black, our products are used by many stationery manufacturers, including manufacturers of high-end products.

Our products are known for 1 high color strength beautiful tinting even in small quantities , 2 high colorfastness durability , 3 good solubility in solvent, and 4 non-corrosiveness safe to use with metals , etc. We are continuing to improve the quality of this product line, developing even safer dyes, and dyes that are compatible with the ink compositions used by our stationery clients, etc.

Basically, we have dyes made of basic dyes that are gentle to the skin and do not trigger allergies. They are commonly used in gray hair dyes and color rinse products. We know that Energy of light corresponds to a wavelength. From this equation we can see that Energy is Inversely proportional to wavelength. So , by putting this value in equation 1 wavelength we get is nm which falls in the UV range. The wavelength corresponding to this value is nm which is also in the UV range.

So wavelength increases. As we can see, the beta carotene molecule which is found in carrots have 11 conjugated carbon as a result the energy gap is very low. This molecule absorbs the wavelength of light around nm.