Dr. Grauert letter

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Logo of the German Institute for Standardization DIN ISO / IEC 10561
Area Printer technology
title Information technology - office and data technology - class 1 and class 2 printers; Procedure for determining printer performance
Latest edition 5.1999
ISO ISO / IEC 10561

The Dr. Grauert Brief is a test template from the ISO / IEC 10561 standard and was developed in 1975. The standard is also available as the DIN standard DIN ISO / IEC 10561 .

The letter consists of around 1450 characters in a 10  CPI font, comparable to the Courier font in 12  pt . The letter represents a business letter as it was typical in the 1970s. The name is derived from the fictitious addressee Dr. Grayed off to whom the letter was addressed.

The text of the Dr. Grauert letter is protected by copyright . The magazine c't , which regularly carries out printer tests, has developed a printing template very similar to the Dr. Grauert letter, the Dr. Grünert letter , which it makes available to its readers for their own tests.

Destination of the letter

The associated standard is intended to make it possible to compare the printing performance of class 1 and 2 printers quickly and easily. Class 1 and 2 printers include type wheel printers , dot matrix printers , inkjet printers and thermal printers .

Laser printers belong to printer classes 3 and 4. This standard is therefore not suitable for comparing the printing performance of laser printers.

Versions

The sample letter has been adapted over the years to reflect current business practices. The last change was made in May 1999, before that the last change was in August 1998.

criticism

Nevertheless, some manufacturers of toner modules like to refer to the test template from this standard. The Dr. Grauert letter test template has a coverage ratio of just 2.8 percent. If the capacity of toner modules is specified according to this template or tested with this template, the result is capacities that are 1.8 times higher than with capacity specifications that were determined with the more practical area coverage of five percent.

literature

  • c't test document for printer tests: Dr. Grünert letter ; in: c't 10/2002, page 202 (FAQ)

Individual evidence

  1. ↑ ISO / IEC 10561: 1999-05. Title: Information technology - office and data technology - class 1 and class 2 printers; Procedure for determining printer performance. May 1999. From Beuth.de, accessed October 8, 2019.
  2. ↑ Dr. Grünert letter from c't in ZIP file format to download from an FTP server.