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.
If CE marking is required, in addition to the other steps of the CE marking process (see below), you must: 1  use the initials CE in the prescribed form (see the grid below).2  of a minimum size-at least 5mm tall (unless this is not possible for very small products).f CE marking is required, in addition to the other steps of the CE marking process (see below), you must: 1  use the initials CE in the prescribed form (see the grid below).