Celluloid, the first synthetic plastic material, developed in the 1860s and 1870s from a homogeneous colloidal dispersion of nitrocellulose and camphor.
The meaning of AD is Anno Domini or Year of our Lord referring to the year of Christâs birth. The meaning of BC is Before Christ. CE is a recent term. It refers to Common Era and is used in place of A.D. the dates are the same i.e., 2009 AD is 2009 CE. BCE means Before Common Era. For example 400 BC is 400 BCE.
What is CE mark/CE marking/CE certification? Being in CE certification for almost 20 years, I have seen that there are a lot of misunderstandings about CE marking. Many people do not exactly understand its purpose. Many do not know which products must bear the CE mark. There are also many questions about in which countries the CE marking applies.