Page 7 - catalog_manual

Sheet Offset Printing
Sheet Offset Printing
～ Tips for FPG grades ～
1 Pre-Press Handing
®
The top and bottom YUPO sheet which
have been kept contact with the cardboard
packing sheet of each pack should be
discardred.
Wrapped YUPO should be brought into
®
press room at least one day before printing
in order to aclimatise to the press room
temperature and avoid moisture
condensation.
2 Press Room Condition
The relative humidity at the machine should
be maintained at not less than 50% to
minimize electrostatic problem.
3 Printing Conditions
● Feeder
®
Unwrapped YUPO sheets should be fanned
before stacking to ensure smooth feeding.
Folding is prohibited. The stacking should
not be loaded more than 5,000 sheets at one
time.
● Abrasions and Marks
The followings are recommended:
To avoid sucker marks, minimize the suction
pressure and/or cover the rubber part of the
sucker with cloth tape.
To avoid wheels and brush marks, move them
away from the image area or cover them with
either PP tape or cloth tape.
● Plates
Pre-sensitized (PS) Plates are recommended.
● Press Setting
Printing pressure should be maintained as
same as natural pulp based papers. The
blanket will sometimes show whitening which
comes from the inorganic fillers in YUPO
®
and normally has no effect on print quality.
A blanket wash-up is
necessary only when the
build -up affects print
quality.
※ You can reduce the paper
dusting problem significantly
®
by using“SUPERYUPO FRB”
®
or “ULTRAYUPO FEB”.
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 Delivery (Avoiding Set-off)
Spray powder should be used and it should
be of the hydrophilic type(i.e.having an
affinity for water, but not soluble). Soluble
or water -repellent powders are not suitable.
Powder should be used 30-50% more than
amount used on coated papers. The particle-
size of 10-20 microns of the powder is
recommended.
● It is suggested
1) Sheets should be racked in piles of 500-
1,000 sheets.
2) Air-pressure and jogging should be
reduced to a minimum.
3) Sheets should not be subjected to
impacts or shocks.
4) Humidity at delivery should be kept over
50% at least to avoid static problem.
 Drying
®
As YUPO is not absorbent, drying will take
longer than with paper.
【Typical drying times】
1 color → 6 ～ 8 hours
2 color → 7 ～ 10 hours
4 color → 10 ～ 16 hours
ˎ :610 $03103"5*0/ CFMJFWFT UIJT JOGPNBUJPO UP CF UIF
CFTU DVSSFOUMZ BWBJMBCMF BOE UIBU JU JT TVCKFDU UP SFWJTJPO BT
BEEJUJPOBM LOPXMFEHF BOE FYQFSJFODF BSF HBJOFE CVU DBO
NBLF OP HVBSBOUFF PG SFTVMUT BOE XJMM BTTVNF OP PCMJHBUJPO
PS MJBCJMJUZ JO DPOOFDUJPO XJUI UIJT JOGPSNBUJPO
 Inks
Inks must be specially formulated for YUPO ®
Synthetic Papers and consist of 100% solids,
contain less than 3% mineral oil, and dry by
oxidation.
Major ink manufacturers have tested YUPO
®
and most have a suitable ink. Please consult
with your ink manufacturer.
 Other Printing Methods
Although most of the conventional printing
processes available can be used for printing
®
on YUPO , we recommend you to perform
preliminary tests before use. Conventional
Sheet-Fed Offset, Rotogravure, Silk Screen,
Business Form and Rotary Letterpress are
®
most commonly used for printing on YUPO .
Sheet Offset Printing
Sheet Offset Printing
～ Tips for SUPERYUPO (FRB/FRR) ～
®
1 Offset Printing ［When printing with up to 200% ink coverage］
Standard inks can be used.
※ Use inks suited to your performance
● Sheet characteristics
・Can use ordinary inks. requirements for durability, etc.
・Extremely fast ink drying. ● Key points
・Excellent dot reproduction and fine glossy finish. Dampening water adjustments: Restrict
dampening water as much as possible to the
・Specialized for one-sided printing. point just before the plates are affected by
※ The side when opened (glossy side) is the
printing side. scumming. Do this particularly for the first
● Cautions cylinder.
See above“Sheet Offset Printing ～ Tips for Inks that require caution
FPG grades ～”for cautions regarding basic ａ）Inks that set quickly
printing operation. ｂ）High tack inks (especially in winter)
˔ 1SJOUJOH JOLT
★ FRB…Use standard inks. 2 Screen Printing
★FRR…Choose inks according to the ink
coverage for the job. ● Cautions for printing
®
［When printing with up to 400% ink coverage］ The same inks are used as for YUPO FPG,
Use low solvent inks (inks for special papers, etc.) but be sure to consult your ink supplier first.
Sheet Offset Printing
Sheet Offset Printing
®
～ Tips for ULTRAYUPO (FEB) ～
1 Offset Printing ● Key points
Dampening water adjustments…Restrict
● Sheet characteristics dampening water as much as possible to the
・Use YUPO formulated inks or synthetic paper inks. point just before the plates are affected by
®
・Ink drying is faster than FPG. scumming. Do this particularly for the first
・Dot reproduction and dot gain characteristics cylinder.
are better than FPG. Caution about ink tack in cold seasons…
・Excellent glossy finish. Lower the ink tack for cold inks.
● Cautions Amount of powder… This paper has
See avobe“Sheet Offset Printing ～ Tips for FPG improved setoff properties compared to FPG,
grades ～”for cautions regarding basic printing but slightly more powder should be used
operations. See the“ULTRAYUPO (FEB)” than for coated papers.
®
catalog for a summary of grades. Delivery pile boards…Suitability is about
● Printing inks the same or slightly better than for FPG.
Use YUPO inks or synthetic paper inks. Two-sided printing…Print the side with the
®
★ Drying times heaviest ink coverage first, then print the
100% ink coverage: 1 to 2 hours other side soon (within 24 hours) after drying.
200% ink coverage: 2 to 3 hours
300% ink coverage: 3 to 5 hours 2 Screen Printing
400% ink coverage: 5 to 7 hours
● Cautions for printing
®
ˎ :610 $03103"5*0/ CFMJFWFT UIJT JOGPNBUJPO UP CF UIF The same inks are used as for YUPO FPG,
CFTU DVSSFOUMZ BWBJMBCMF BOE UIBU JU JT TVCKFDU UP SFWJTJPO BT
BEEJUJPOBM LOPXMFEHF BOE FYQFSJFODF BSF HBJOFE CVU DBO but be sure to consult your ink supplier first.
NBLF OP HVBSBOUFF PG SFTVMUT BOE XJMM BTTVNF OP PCMJHBUJPO
PS MJBCJMJUZ JO DPOOFDUJPO XJUI UIJT JOGPSNBUJPO
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