WATER BASED FLEXO INKS

DESCRIPTION
Water based flexo inks designed primarily for narrow web presses printing self adhesive labels. Especially suited to printing onto thermal papers.

PROPERTIES
Low viscosity, Water reducible, Good heat smear and water resistance, High colour strength, Good press stability
Pulse Roll Label RT series inks have been formulated to comply with Food Packaging Legislation. Please see:- Swiss List Eupia Information Note regarding the Swiss list. EuPIA information note on inks for food packaging. The raw materials are selected in accordance with the "Selection scheme for packaging ink raw materials" of the EuPIA Guideline. EuPIA 2
To achieve compliance it will be necessary to carry out a suitable evaluation. Please contact Pulse Roll Label for advice on this evaluation process. It must also be remembered that the manufacturer of the packaging and the filler are responsible for the properties of the food packaging and its compliance with legal requirements. The packaging ink suppliers are not able to issue certificates or declarations of compliance which cover the legal responsibility of others in packaging chain.

APPLICATION
Mix well before use, Anilox 90 - 120 l/cm, Cell volume 7-10 cm3/m2, Minimum dryer temp 500^C with good air flow, Print speeds up to 150 m/min, Clean equipment immediately after use

SUBSTRATES
Uncoated papers and boards, Coated papers and boards, Uncoated (eco) thermal papers, Semi and top coated thermal papers

GUIDELINES FOR USE
(Continued) Thermal Printing: RT series are designed for use on all types of thermal papers
Laser Printing: RT series inks are normally suitable for laser overprinting. Suitable tests should be made first to ensure full compatibility.
Thermal Transfer/Hot Foil Printing: RT series can be used for overprinting with thermal transfer ribbons, although different ribbons will give different properties. Hot foiling over RT inks is normally possible but should be checked prior to production runs.
Varnishes: Varnishing of RT series is possible, but care should be taken to ensure the varnish is suitable for direct thermal applications. Our technical department can provide advice for the best varnish to meet your needs. An excessive build up of ink layers/varnish should be avoided as this can negatively affect the direct thermal image.
Cleaning: Anilox rollers and equipment should be cleaned immediately after use with waterbased ink cleaner such as RLA394 Flexwash Aqua III wash-up.

ADDITIVES
Under certain conditions, additives may be required to ensure optimum performance: -

Retarder: Up to 5% RLA330 can be added when the ink is observed to be drying too fast, for example in warm conditions or when press speeds are very low.
Defoamer: Up to 3% RLA322 should be well mixed into the ink to destroy any excess foaming. Do not exceed 3% addition.
Print Aid: Up to 5% RLA324 can be added to the ink when used on long print runs to ensure pH is maintained at an optimum level.
NB - Do not add RLA324 if running jobs where ‘Nestle-compliance' is required.
Reducer/Accelerator: Upto 5% RLA325 can be added to the ink if it is too viscous. This will also help to speed up the drying of the ink.
Thickener: Upto 2% HAW00104 can be added to thicken up the ink to aid transfer and reduce mottle. Be careful as 2% addition of HAW00104 will take 10 minutes to take affect fully in the ink, and the drying speed can be reduced by over-additions of this additive.

RANGE Shade Product Code Lightfastness Comments

Shade	Product Code	Lightfastness	Comments
Transparent White	RT000	-
Yellow	RT003	4-5
Yellow 012	RT004	4-5
Orange	RT005	5
Warm Red	RT006	4-5
Red 032	RT007	5
Rubine	RT008	4
Rhodamine	RT009	3	These inks contain 'Fanal' pigments, so are not suitable for Nestle work
Purple	RT010	3
Violet	RT011	3
Blue 072	RT012	5
Reflex Blue	RT013	5
Process Blue	RT014	8
Green	RT015	8
Black	RT016	8
Dense Black	RT017	8
Process Cyan	RT018	7
Process Magenta	RT019	3
Process Yellow	RT020	4
Process Black	RT021	8
HR Rhodamine	RT9009	6	These inks do not contain Fanal-type pigments
HR Purple	RT9010	6
HR Violet	RT9011	8
HR Blue 072	RT9012	8
HR Reflex Blue	RT9013	8

NB - There is no opaque white in this range as the titanium dioxide white pigment has been shown to adversely affect thermal print-head wear.

STORAGE & HANDLING
Store at temperatures between 100^C and 200^C. Protect from frost.
In unopened containers RT series inks have a shelf life of 12 months.
Formulated specifically for printing on to thermal papers, RT series offers outstanding heat resistance on both coated and eco grades of thermal paper. Optimum resistance properties can be achieved without the need for press side additions.

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