The majority the identifying information from a drawing will come from the title block. Usually on bottom right hand corner, you will often find the following types of information.
CHM holds various types of architectural drawings. Just because a job is listed in the inventory does not mean that CHM holds the original, complete set of construction drawings. Most often the inventory notes what type of drawings are included in the roll. Some examples of the types of drawings that CHM holds include:
Note that there is often variation in the terminology used for technical drawings
Even when excluding digital formats, there are several different material types you will encounter, often different materials are interleaved in one architectural roll.
Some commons materials include: Paper, linen, vellum (often not true vellum, but plasticized paper or linen), mylar, foam-core as a support, drafting film, tracing paper, "sticky-back" overlays, and photostats. You may encounter different techniques for original drawings, such as pencil or pastels, or for reproductions, such as Diazo or pen plotter (which can look like an original drawing). We've noted below which materials to look out for that may require special handling.