The IGT CloudOscope is an advanced cloud point tester for determining the cloud point of a resin, where the cloud point is the temperature at which a heated and homogeneous resin/oil mixture starts to become cloudy when it starts to cool down after heating. Deviations in the cloud point lead to sedimentation of the varnish, differences in drying speed and loss of gloss & tack stability.

It is generally accepted that low cloud point temperatures are an indication for an improved compatibility of oil and resin.

The method is in full compliance with ASTM D6038-05 Standard Test Methods for Determining the Compatibility of Resin/Solvent Mixtures by Precipitation Temperature (Cloud Point) and the Eurocommittee Method for Cloud Point Testing.

The CloudOscope is a more advanced version of the “Varnish Cooker”, as no real time measurements are possible with this simpler device.

Measurement Method

• Place the chosen volume of the resin in a chosen volume of solvent
• Heat the tube following a standardized heating profile
• Stop heating and let the sample cool down, measure the turbidity of the solution until it reaches a pre-set level
• Determine the temperature at which this starts

Features

• Easy to clean
• Stainless steel housing
• Chemically resistant display
• User-friendly operation
• Programmable temperature, stirring speed and level of cloudiness
• Measurement with wireless PT100 sensor
• External printer to print measuring result
• Optionally to be connected to a computer

Use advantages

• Robust and versatile design
• Fully Stainless steel housing and frame for long trouble-free use and easy cleaning
• Wireless temperature probe to prevent problems with cabling in hot and dirty atmosphere
• External printer to keep the housing of the tester closed
• Low Total Cost of Ownership
• Fully compatible with ASTMD6038 and 5958

Technical data

Electrical connection: 230 VAC ± 5 %. 50 – 60 Hz, 5 Amps max. / 110 VAC ± 5 %, 50 – 60 Hz, 10 Amps. max.
Net Weight: 20kg
Dimensions (H x W x D): 290 x 440 x 280 mm

Options

• Printer (CloudOscope only)
• Stirring magnet
• Test tube stand

Applicable Standards and Methods

• ASTM D6038-05 (Standard Test Methods for Determining the Compatibility of Resin/Solvent Mixtures by Precipitation Temperature (Cloud Point)
• Euro Committee Method for Cloud Point Testing
• Practice For Preparation of Oil-Based Ink Resin Solutions Using the Thermotronic II Varnish Cooker

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