Advantages of thermochromic materials, otherwise known as transition lenses, include the convenience of not having to switch to prescription sunglasses. A disadvantage would be not transitioning completely to a transparent state, or being too opaque.
thermochromic advantages
"Safe" in what sense?Thermochromicity is not, in and of itself, a hazard. A material might be thermochromic and explosive, or thermochromic and toxic, or thermochromic and flammable ... or might be none of those things.
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All materials have advantages or disadvantages - this depends on their use and cannot be enumerated in general.
What are advantages and disadvantages of false gold teeth
Using synthetic materials, are less expensive for the suppliers to buy.
Choosing MaterialsWhen choosing materials involves weighing advantages and disadvantages of the different materials ( higher quality, stronger materials are usually more expensive)
Some of the advantages of using popular materials for making clear plastic tubes are that the material is light weight, durable and easy to produce. The disadvantages are that the tubes can produce a danger to wildlife.
Advantages and Disadvantages of equity
Advantage: Clean burn-off and evaporation of unwanted materials Disadvantages: Difficult to handle and maintain. Materials exposed to vacuum should be vacuum compatible, e.g. no gasses should be trapped in constructions and/or materials