A optical lens produces its focusing effect because light travels more slowly in the lens than in the surrounding air, so that refraction, an abrupt bending, of a light beam occurs both where the beam enters the lens and where it emerges from the lens into the air.
http://www.visopto.com/optical-lenses/

The most common option for creating lamination fabric is to use iron-on vinyl.


Unlike using a laminator, using iron-on vinyl will allow you to make a laminated fabric that you can still work with and sew into other projects.
http://www.taiwanfabric.com/lamination-fabric/

The growing need for clean label products is a broad demand but a real one. According to Nielsen, clean label products have been the biggest growth drivers of the packaged food and beverage industry in the past five years. Fruit powders can help slim down ingredient labels and increase wellness claims as they are natural and retain many of their built-in health advantages.

https://qyherb.com/

There's another old process -- one you probably don't know much about -- that's gaining in popularity and may join wind and hydropower in the pantheon of clean, renewable energy. The process is known as gasification, a set of chemical reactions that uses limited oxygen to convert a carbon-containing feedstock into a synthetic gas, or syngas.

https://huangtaigroup.com/

Bees use propolis, or “bee glue,” as a sealant. Historically, humans have used it topically or as an oral supplement. However, it may not be suitable for everyone.

http://www.msfbees.com/beeswax/