@Johannes has recently bought SmartLF Scan! 36" scanner

Papersizes – A0/A1 and Arch D/E

What does A0/A1 and Arch D/E mean?

Let´s start by looking at the different formats. A1 and A0 are ISO and D and E are Arch or ANSI/ASME.

Broadly adopted ISO paper sizes for large format scanning.

The international paper size standard is ISO 216. It is based on the German DIN 476 standard for paper sizes. ISO paper sizes are all based on a single aspect ratio of the square root of 2, or approximately 1:1.4142. There are different series, as well as several extensions.
The base A0 size of paper is defined as having an area of 1 m2 and a side ratio of 1 by √2, making the A0 paper size exactly 841 by 1,189 millimeters (33.1 in × 46.8 in).
Successive paper sizes in the series A1, A2, A3, and so forth, are defined by halving the preceding paper size across the larger dimension. This also effectively halves the area of each sheet. The most frequently used paper size is A4 measuring 210 by 297 millimeters (8.27 in × 11.7 in).

The Colortrac SmartLF Scan! 24″ will Scan up to A1 sized documents. Read more about the A1 Scanner here

The Colortrac SmartLF Scan! 36″ will Scan up to A0 sized documents. Read more about the A0 Scanner here

American paper sizes for D and E size Scanners

In addition to the system listed above, there is a corresponding series of paper sizes used for architectural purposes defined in the same standard, ANSI/ASME Y14.1, which is usually abbreviated “Arch”. This series also shares the property that bisecting each size produces two of the size below, with alternating aspect ratios. It may be preferred by North American architects because the aspect ratios (4:3 and 3:2) are ratios of small integers, unlike their ANSI (or ISO) counterparts. Furthermore, the aspect ratio 4:3 matches the traditional aspect ratio for computer displays.


The Colortrac SmartLF Scan! 24″ will Scan up to D sized documents. Read more about the D-Size Scanner here

The Colortrac SmartLF Scan! 36″ will Scan up to E sized documents. Read more about the E-Size Scanner here

The SmartLF scanners

The SmartLF comes in two sizes to cover your wide scanner needs – the 24” and the 36” indicating the maximum scanning width. Both types will scan items up to 109” long (1270 mm). The SmartLF large document scanner is lightweight, portable and fast – 4.5 inches per second in grayscale and 3 inches per second in color.