In an offset press, the fountain solution is used to separate ink from the image and non-image areas on the offset plate, which is why ink on a full size running offset press is seldom ‘dry’, but an emulsion of ink paste and fountain solution.
In order to be able to simulate this phenomenon in the laboratory, a dedicated procedure is required to maintain stable conditions for printing, which is provided by hydroscopic measurements.
The Hydro-Scope offers a procedure for the preparation of printing emulsions, which correlate with the state of such emulsions on a full size press. With the Hydroscope Printability Unit, one can ink up a printing disc in no time and immediately make a print on paper, allowing one to analyse how real ink/fount emulsions interact with a known paper as a function of transfer and print/show through.
With the additional tack measuring roller, one can further investigate the ink/fount emulsion interaction with paper as a function of tack force development immediately after printing.
Specifications of the Hydro-Scope:
- Testing speeds: Accurate speed control from 0 - 600 m/min
- Syringe volume: 10ml (storage of fountain solution)
- Input voltage range: 110 - 115 or 220 - 240 volts, 50 - 60 Hz
- Power consumption: 350 watts
- Dimensions: 77cm x 32cm x 33cm
- Weight: 70kg