What causes headaches during pregnancy? During the first trimester, your body experiences a surge of hormones and an increase in blood volume. These two changes can cause more frequent headaches. These headaches may be further aggravated by stress, poor posture or changes in your vision. Other causes of headaches during pregnancy may involve one or more of the following: Lack of sleep.
Lucite, also known as acrylic, Plexiglas and Perspex, is the synthetic polymer polymethyl methacrylate. In essence, it is plastic, but with advantages... Acrylic Vs. Plexi Glass Acrylic and Plexiglass are often used interchangeably in product literature concerning sheet plastic.
Transparency. Acrylic is as clear as optical glass but it allows more light while also filtering ultraviolet. Glass allows 80 percent to 90 percent of visible light to pass while acrylic transmits 92 percent. And acrylic does not yellow with age or appear milky, as thicker panes of glass can.