### substance:

Dye
* All dyes come from natural plant sources or minerals.
* Many dyes used as lasing medium are toxic, carcinogenic, corrosive or pose a fire hazard.
* Most dye changes color
  - contains chemicals
  - has color
* Most dyes seem to present environmental risks
  - used in dye lasers are fluorescent organic compounds
* Some dye causes eye injuries
  - comes from petals
* Some dye replaces dye
  - natural dye
  - requires water
* Some dyes bleed in drycleaning
  - laundering
* Some dyes can also cause severe skin reactions
  - cause similar allergic skin reactions
  - change color on exposure to combustion gases present in the air
  - stain the skin and clothing and certain chemicals can make holes in clothing
  - tend to fade over time while others remain vibrant for a long period
  - used for toilet paper are difficult for bacteria to break down
* acts as a diuretic.
* also fade over time, especially in direct sunlight
  - work around similar conjugated centers, although dye chemistry is much more complex
* alternitives There are as many ways to make candles as there are ideas.
* are a solution and are smaller than pigments on the molecular level
  - also quite expensive, and sometimes difficult to get
* are available in both liquid and powder form
  - powder, blocks, chips, flakes, and liquid
  - low-impact and nontoxic
  - manufactured as powders , granules , liquids or other special purpose forms
  - non-toxic and odourless
* are organic compounds that have affinity for specific cellular material and increase contrast
  - with absorbances in the visible range
  - placed in dog food for the benefit of the person serving the food
  - sensitive to pH and temperatures when being applied
  - soluble in some type of a solvent
  - useful tracers to stain the flow pathways of water and solutes in the vadose zone
  - usually organic substances that actually change the color of fabrics
  - water soluble and packaged as a powder concentrate
* binding methods measure total protein but lack specificity for albumin.
* can also grab light on paper
  - bleed and detergents have a harder time dissolving because there's less water
  - identify parts that have been coated and improve their appearance
* comes in liquid form that is highly concentrated.
* containing anthraquinone unit belong to mordant, disperse and vat dyes.
* contains alcohol that removes moisture from the leather when applied
  - nasty chemicals
* convert green light to red light which can be used by plants.
* flows without obstruction into the duodenum.
  - great quality
* improve contrast by selectively staining certain parts of the specimen.
* inks work best on coated stock or papers with a hard surface because they are fast-drying
  - very well with more porous sponges than the cosmetic sponge
* is colour
* lives in California.
* merge to create the color instead of being layered on top of one another.
* mix by what is known as the subtractive mixing process.
* probably result in poorer water quality throughout the growing season.
* remain water sensitive when dry.
* require a mordant to set the color.
* run slowly.
* starts to deteriorate and evaporate, almost immediately.
* transfer from wall coverings and rugs.
* usually have specific chemistry for use with very specific materials.
* works as well for water trapping or land trapping, including canines.
+ Food coloring, Dyes and lakes: Food ingredients :: Chemistry
  * Dyes dissolve in water, but are not soluble in oil. Dyes are manufactured as powders, granules, liquids or other special purpose forms. They can be used in drinks, dry mixes, baked goods, confections, dairy products, pet foods and many other products. Dyes also have side effects which lakes do not, including the fact that large amounts of dyes ingested can color stools.