Semi-Matt 620

Specification

570 620/35

Viscosity¹ in s,
approx. 35

Solids content,
approx. 42%

pH 7.8 - 8.2

Specific gravity 1.03 g/ml

Heat-sealing resistance²
2 plies MS film
2 plies XS film
very good
very good

Rub resistance very good

Application rate, wet³ 4 – 8 g/m²

Thinner water

1. Viscosity as delivered, at 20 °C (DIN 53 211 draining time, 4 mm diameter nozzle)
2. 1 s, 150 °C (upper sealing jaw), 10 kPa (tested on Brugger’s heat-sealing unit.
Material used for the test: coated cellulose card printed with magenta)
3. Depends on application method, card stock, and underprinting.

Cleaning

We recommend ACRYLAC Cleaner 10 T 0045 for cleaning rollers, rubber blankets, form cylinders, etc.

Auxiliaries

A number of auxiliaries are available for use with this dispersion varnish:
ACRYLAC Cleaner 10 T 0045
ACRYLAC Fit 10 T 0606

These chemicals are found under the auxiliaries section of the varnish inks.
Retarder/Anticrazing Agent 10 T 0422
Defoamer 10 T 0423
Wetting Agents 10 T 0072 and 10 T 0690

Special instructions

Heat-sealing resistance depends on many factors; we therefore recommend testing under actual working conditions.
• Suitability for finishing with hot-sealing foil must be tested in practice. It depends on the printing stock and the type of foil.
• Resistance to the heat of the various materials used for tools (e.g. metal) must be tested in practice.
• If moisture will be a factor (e.g. with double-sided varnishing) or if package contents may have detrimental effects on the packaging, suitability should be checked accordingly.
• Under German food regulations, dispersion varnishes are suitable for the manufacture of food packages when properly processed and used. Varnishes must not be in direct contact with the packaged foodstuff. The basis for this statement is § 31, section 1 of these Regulations.
• Neither a statement of harmlessness nor an assurance under Recommendation 36 of the BGA can override the provision of § 31, section 1 of these Regulations.
• For general processing instructions and information about drying, please contact us.
• Dispersion varnish must always be protected from freezing during storage.
• Mix thoroughly before using.

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