CHARACTERISTIC

These varnishes are a range of radical UV varnishes for dry offset/letterpress.

PROPERTIES

• All these varnishes can be applied wet-on-dry on water- and solvent based inks and wet-on-wet or wet-on-dry on UV inks.
• The surface tension of the cured film with non gluable varnish is < 34 mN/m and ≥ 38 mN/ m for gluable varnishes
• These varnishes are are formulated with low toxicity ingredients.
• Low in wet odour and very low odour in the cured print.
• These varnishes have a good transparency.
• These coatings are available press ready at optimal viscosity.
• These varnishes can be applied with normal letterpress plates or with blankets on an offsetpress.
• Optimal resistance properties will be obtained 24 hours after printing

Ref.	Characteristics	Gloss	Viscosity 21°C mPa.s
UV3000	Standard gloss	High	10 – 15
UV3001	Standard matt	Low	15 – 20
UV3002	Primer for foil	High	10 – 15

 

TYPES

Radical chemistry

APPLICATION AREA

Dry offset/letterpress

UV CURING SPEED

Curing speed is 200 MPM with 2 lamps of 120 Watt/cm.
The curing depends on the kind of UV curing unit (reflectors, age and power of the UV lamps, the printed ink layer thickness and the belt speed of the UV curing unit). In certain cases the flow and the gloss can be improved by passing prints under IR lamps prior to UV curing.

POST CURING

The adhesion of the varnish is best evaluated after 24 hours. In this time interval, a post curing effect takes place during which the varnish cools down and the UV chemical termination reaction happens, resulting in a better adhesion.

SAFETY

These UV varnishes are formulated free of heavy metals and comply with toy regulation EN 71/3 standard.
These varnishes are REACH compliant and free from SVHC substances (Reach annex XIV) and substances mentioned on the candidate list (last update 16122014).
Please consult the MSDS.

SHELFLIFE & STORAGE

When the UV varnish is stored between 15 and 20°C in its closed original can, shelf life will be minimum 12 months from date of manufacture.

REMARKS

1. Rollers: the following roller material is recommended : EPDM (Ethylene-Propylene-Diene-Monomers). EPDM rollers show excellent performance with UV-inks.
2. Stir well before use.

SUITABLE SUBSTRATES (min. surface tension 38 dynes/cm)

• All kinds of paper and board
• Corona treated PE-films

Preliminary adhesion tests are recommended

PACKAGING

• 1kg tins
• 3kg tins
• 10kg pails
• 200 kg barrels

ADDITIVES

Wash-up solution	for manual washing	UV0009
	for automatic washing	UV0002
Photoinitiator		UV0011
Additive		UV0007
Thinner		UV0018