IQ150 / IQ200 (Reflection Densitometers)

The Tobias model MTI Mottle Tester reduces a heretofore purely subjective measurement to a reproducible numerical index value which can be applied both in quality paper manufacturing control and in the graphic arts for the critical selection of papers for fine printing.

The model MTI is a compact bench-top system complete with its own video monitor. In use, one, two or three samples may be attached to the scanning drum. Once variable sampling parameters are set through the unit keyboard, the scanning analyzer automatically measures across the width of the drum as the drum rotates. Measurements are made to a sensitivity of 0.001 density units.

A complete drum scan takes place in less than two minutes. Results in the form of a mottle index number and bar graph can be directed to a printer as well as displayed on the video.
The system, although very simple to operate, employs a number of sophisticated techniques to assure significance and reproducibility of the results. The built-in microprocessor system, for example, is capable of applying various degrees of digital filtering to the data which has been found to help separate unavoidable printing irregularities from the observed mottle. In addition, a wide variety of sampling techniques may be easily set to meet different testing demands.

Originally developed at the request of the International Paper Company, the model MTI Mottle Tester is already proving its merit in practical use and is now available to the paper and printing industry in general.

Please call Tobias Associates for further information and for evaluation of specific measurement problems.

• Measures mottle on printed paper in less than 2 minutes.
• Produces a mottle index value as well as a bar graph showing density variation to ± 0.001 density units.
• Measures one, two or three samples per operation.
• Ideal for paper manufacturers and printers who are concerned about high quality print reproduction.