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There's only one way to manage color effectively, meet customer
expectations, and maximize job profitability! That is: Objective
Color Measurement. In other words, densitometry.
Essentially this is a matter of reading a colorbar for solid
ink, dot gain, or other density-derived
characteristics.
However, the limited trim areas of a short cutoff press require
use of narrow 1/16" (1.6mm) bars
for color control. No other device on the market can do this.
Setting up a press is logical and uncomplicated. After keying
in job parameters (type of press/sheet size/colorbar structure),
position the colorbar between two horizontal scribelines and
against the side guide. The vacuum hold-down secures sheet placement
and the SDT does the rest.
A typical scan takes only 10 seconds. As the SDT scanning
head travels across the press sheet, it strokes the colorbar
VERTICALLY to determine bar position and skew. On the scanning
head's return trip, having detected the skew of the colorbar,
the head scans right down the middle of the bar for accurate
densitometric readings.
The SDT has an accurately flat, rugged platen with vacuum hold-down.
The design supports the bridge and measuring probe head.
Unique pass-through feature allows the entire press sheet
to slide freely under the bridge, enabling scans of centrally
located colorbars and bars at the bottom of the sheet.
Sampling a few sheets during the run provides an immediate
comparison of performance to specifications. And by charting
long-term trends, the SDT becomes an essential quality assurance
tool.
Statistical analysis of the entire job file is performed by
SCP software that comes with the system. Color-coded graphical
displays show X-bar and range data for each scan. A frequency
histogram generated from readings charts the distribution.
The SDT Scanning Densitometer system includes all the components
needed for effective color management. Its modular design
allows for the convenient placement of the components according
to the layout of your pressroom.
Optional Closed-Loop for Automatic Press Key Controls
The CLM Closed-Loop Module, in conjunction with the Tobias’ Scanning Densitometer, allows for off-line closed-loop control of most automated press consoles. Click here for more information.
- Reads most standard colorbars as well as custom-made colorbars
and gray balance bars
- Built-in certified calibration plaque for automatic calibration
to Standard T-Ref or Status "E" values
- Customer can assign ink density "target values" from either
house densities or customer "OK"
- Allows for multiple unit networking capability
- Supports "closed loop operation" with most automatic press
consoles
- Generates complete sets of reports for quality control
departments
- Measures colorbars as narrow in height as 1/16" (1.6mm)
using patented "Seek & Find" software program
- Scans colorbars in less than 10 seconds
- One SDT can serve multiple presses simultaneously
- Vacuum hold down and rugged construction built for the
pressroom
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