Coated Synthetic Papers for Offset Litho
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SYPH is an extruded synthetic paper with a print receptive coating on both sides, suitable for printing by all popular methods such as offset, uv, screen and flexo. The material is durable, water resistant and versatile, it can be punched, stitched, glued and creased.
SYPH Typical Applications
Recommended for use in:
o Baggage tags
SYPH is a cavitated and extruded material, which is coated on both sides and has excellent tear resistance in both directions. It is also a food certified product. The material is 100% recyclable and meets todays environmental requirements.
Can be purchased in roll form or as sheeted material. Maximum width of 1300mm in roll form. Sheet sizes can be tailored to customer requirements. Available in thicknesses from 100µ to 290µ.
Standard litho inks. Oxidising and UV lithographic printing and screen printing process inks. When printing litho, the use of oxidizing inks will reduce drying times. Please read our Printing and Converting instructions for offset printing on our website
Synthetic Paper is suitable for printing by all popular printing methods: Offset, Screen, Flexo etc.
The following information has been produced as a guide to using this material.
SYPH has very good tear resistance in both directions. The sheet is coated both sides to accept conventional inks. When printing litho, oxidising inks will decrease drying time.
SPA, SPC, SPCT has very good tear resistance in one direction only. The heavier weight sheets will offer good resistance in the other direction also. The sheet has no coating and should be printed using oxidising inks only.
Unwrap just prior to printing
Relative humidity of pressroom should be at 50-60%
Make Ready on the same material that is being printed
Do not use settings as you would for paper (where the fibres absorb the fount solution from the blanket). This does not happen when printing on plastic material
Due to the low absorbency of material damping must be kept to an absolute minimum – excess water will greatly retard ink setting increasing the drying time
Do not use normal fount solution. Proprietary fount solutions contain wetting agents / buffers / hydro-carbons should not be used.
pH value suggested 5.5-6.0
A mixture of water and 10-15% isopropyl alcohol should be used. This will have the highest contribution in the reduction of drying time.
SPA and SPC grades require oxidizing inks
SYPH grade has a coating that will accept conventional inks, however, this will lengthen drying times considerably; oxidizing ink is recommended. If lightweight material is used with a heavy ink film requiring close register then use fully oxidizing ink to avoid the risk of distortion
Screen inks with solvent thinners may distort the surface and should be tested
Light fast inks should be specified for long-term exposure to daylight
Use minimum ink – ink rests on the surface and is not absorbed as with paper
For best results contact your ink supplier for further advice on printing on synthetics
Drying agents can be added to the ink or fount to speed drying times. Those added to the ink have given the greater improvement in drying performance
Use a non-vanishing spray powder of 20 microns plus; it is recommended a smaller quantity of a larger size (30 micron) is used
Keep printed stacks to a height not exceeding 200 sheets – it is suggested a racking system on a pallet is used
Air the sheets to promote circulation
When used forced drying methods heat must be kept to a minimum to avoid distorting the sheet. IR systems should not be used with oxidizing inks
GUILLOTINING/ DIE CUTTING
Work must be fully dry before further processing
Blades and cutters must be sharp
Avoid acute internal angles that may cause a weakness to the material. Rounded shapes are better
Due to the synthetic nature of the material care should be taken to avoid the build-up of static
SYNTHETIC PAPER comes in many thickness varieties and widths. It can punched, stitched, eyeletted and glued. Self-adhesive is also available on request.
All Synthetic Paper products have a closed cell structure so 30-50% less ink needed
because ink stays on the surface giving a more vibrant image.
SYPH :- Extruded – 5 layers – core made up of 3 layers of foamed film and a film covering either side of solid outer layers. Coated to accept any offset inks, high opacity, brighter white, flexible, lightweight
SPA:- Calendered – single layer – no coating – only oxidising inks, UV or screen inks to be used. Heavier and more rigid than SYPH
SPC:- Calendered – heavier grade, single layer, uncoated. Same surface as SPA.
SPCT : Calendered – matt surface treated, uncoated. Same surface as SPA and SPC.
SPCD: Calendered – matt surface treated, uncoated. The strength of SPCD is better than SPA, SPC and SPCT.
SPG:- Coated one side only for printing. Reverse for adhesion hence 60, 75 and 95 micron thickness. Mainly for label stock.
Note:- Cobalt driers added to the fount solution can result in a matt image. Care should be taken with sheets thinner than 100 micron as these can cause problems with grippers on the machine.
The above information is produced as a guide only. Testing prior to running a job is recommended.