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Papper & Pappersval
Papper & Pappersval
http
://as
hbyd
odd.
com
/wp-
cont
ent/
uplo
ads/
2015
/01/
crum
pled
-whi
te-p
aper
-tex
ture
.jpg
Max Holmberg
Agenda
• Infografik • Film om tillverkning • Bestrykning • Glättat/Kalendrerat • Gloss, Silk & Matt • Strukturerat • Färgat
• Ytvikt • Tjocklek & Bulk • Format • Fiberriktning • Opacitet • Att välja papper • Amazing Paper Trick
For more information visit www.paperonline.org
WIRE SECTION The water is then removed on this wire section. Here the fibres starts to spread and consolidate into a thin mat. This process is called “sheet formation”.
HEADBOX Squirts a mixture of water and fibre through a thin horizontal slit across the machine’s width onto an endless moving wire mesh.
DRYING A series of cast-iron cylinders, heated to a temperature in excess of 100°C, where the web of sheets pass through and drying takes place.
DE-INKING Glues and ink are removed using a flotation process.
PULPING Paper for recycling is dissolved into pulp to separate the component fibres.
PRESS SECTION Squeezes the web of wet papers and lowers water content to 50%.
Paper MakingThe wood pulp is diluted with 100 times its weight. The liquid fibre is then run through the machine.
CALENDARING After coating, the paper can be calendered. A calendar is a device with two or more rollers through which the paper is run. The compression of the rollers and the application of heat give the paper its smooth and glossy properties.
FINISHINGREELS The papers are then wound into a reel or cut into sheets.
DE-BARKING AND CHIPPING Bark which cannot be used for papermaking is stripped from the logs. Stripped logs are ‘chipped’ into small pieces.
PAPER FOR RECYCLINGPaper for recycling is the most important material for the pulp and paper industry.
WOOD Wood is an important raw
material for the pulp and paper industry and comes from
sustainably managed forests.
MECHANICAL PULPINGREFINERWoodchips are ground to separate the fibres, the process produces higher yield of fibre than the chemical pulping process, but uses more energy. Pulps are used to make high volume commodity printing products such as newsprint and magazine paper.
CHEMICAL PULPINGDIGESTER The woodchips are cooked to remove lignin. The process yields a lower amount of fibre then mechanical pulping process, burning of the process by products enables the whole pulping process to be energy self-sufficient.
CLEANING The fibres are then washed; screened and dried.
The pulp is ready to be used directly or it can be bleached into white paper.
PAPERMAKING PROCESSToday’s high quality papers require a highly technical and accurate manufacturing process. This diagram details the paper making process and illustrates the extensive use of paper for recycling. New pulp however, is an integral part of the paper making process: paper cannot be recycled indefinitely because the fibres lose their paper making qualities.
CEPI aisbl • Confederation of European Paper Industries250 Avenue Louise, box 80 • B-1050 Brussels • Belgium
COATING In the coating process, coating color is spread onto the paper
surface. The coating color contains pigments, binding
agents, and various additives. Coating the paper several
times often improve its printing properties. High-grade printing paper is coated up to 3 times.
Pappersyta
Obestruket
Bestruket Glättat eller Matt Slätt eller Strukturerat
Bestrykning
Obestruket
Bestruket
Glättat eller Kalendrerat
sammanpressat mellantunga stålvalsar
http
://ww
w.m
ypri
ntgu
ide.
org/
glos
sary
/im
ages
/Cal
ende
ring
.jpg
Olika Bestrykning
Gloss Silk Matt
strukturerat (obestruket)
http
://ww
w.la
jka.
sk/a
pi/i
mg/
get?
nam
e=12
843-
Papi
er-R
ives
-Tra
diti
on-P
ale-
Crea
m.jp
g
Färgat papper
http
://or
ig15
.dev
iant
art.n
et/e
e53/
f/20
13/0
26/5
/5/c
olou
red_
pape
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mar
za-d
5std
2f.jp
g
oftast obestruket
påverkar tryckets kulör
exklusivare = dyrare
titta och känn
Tryck på Färgat papper
http
://ww
w.la
jka.
sk/a
pi/i
mg/
get?
nam
e=12
871-
Papi
er-K
eayk
olou
r-O
rigi
nal-
Tang
erin
e.jp
g
Vikten i gram per kvadratmeter [g/m²] Papper - upp till 170 g/m² Kartong - mer än 170 g/m² Papp - mer än 400 g/m²
Vad väger då ett 80 g A4?
Ytvikt
http
://im
age.
mad
e-in
-chi
na.c
om/2
f0j0
0ZSP
EvRl
chM
kQ/B
est-
Qua
lity
-Cop
y-Pa
per-
80GS
M-7
5GSM
-70G
SM.jp
g
Tjocklek & Bulk
Tjockleken Mäts med micrometer i tusendels millimeter [µm]
Bulk Relation mellan ytvikt och tjocklek Mäts i kubikmeter per gram [m³/g]
Papper med lika ytvikt kan ha olika bulk
http
://ww
w.wo
nkee
donk
eeto
ols.
co.u
k/m
edia
/wys
iwyg
/CM
-Cal
iper
s-M
icro
met
ers-
Kath
erin
e/CM
69/C
M-6
9-7.
jpg
Format
A0 = 841x1189 mm ≈ 1 m²
A4 = 210x297 mm
1st A0 = 16st A4
Udda format = pappersspill
Fiberriktning
http://image.slidesharecdn.com/basicsofwoodpulpandpaper-november2012-130130054018-phpapp01/95/basics-of-wood-pulp-and-paper-november-2012-72-638.jpg?cb=1359524638
Viktigt när man falsar mot fiber = spricker med fiber = rakt och snyggt
Andra siffran i måttbeteckningen = fiberriktning
Fiberriktning på vanligt A4?
http://www.citrograph.com/wp-content/uploads/2015/01/crackedpaperonfold-800x420.jpg
Opacitet
Hög opacitet Låg opacitet
http
://ww
w.co
nver
genc
etra
inin
g.co
m/I
mag
es/C
ours
es/p
aper
-boa
rd-o
ptic
al-t
est-
2.jp
g
välja papper
Känsla Ekonomi
Läsbarhet Livslängd
Tryckmetod Miljöpåverkan
Efterbehandling
The Amazing
Paper TRICK
