What Type of Film Do You Have?
EXAMPLES OF ROLLFILM
Microfilm is a 16 or 35mm photographic film with protective lightproof backing wound onto a spool. It resembles movie film but without sprocket holes and usually wound onto a metal or plastic spool and stored in a cardboard or plastic box. Microfilm contains all kinds of images such as documents, newspapers, plats, and maps. In the sections below, we have illustrated and described the different formats of microfilm so that you can correctly identify your film type.
These numbers refer to the width of the film. A 16mm roll of microfilm is 0.63 inches wide and will generally be 100ft or 215ft long depending on film thickness. Based on reduction ratio a 100ft roll will contain approx 2,500 images while 215ft roll will contain about 5,500.
A 35mm roll of microfilm is 1.38 inches wide. It will normally, but not exclusively, have images of larger documents like maps and newspapers. An average image count for a full 35mm roll is approximately 600 images.
Negative rolls have black boxes (frames) with the text being clear. No matter whether you have positive or negative rolls, after scanning is completed, all of the delivered images will be white pages with black text and the extra background will be cropped out.
A positive roll has clear frames, black text, and a black background. No matter whether you have positive or negative rolls, after scanning all images will be white with black text and the background will be cropped out.