| Coating technology | Sappi Fine Paper Europe | 1

Paper technology

Coating

| Coating technology | Sappi Fine Paper Europe | 2

From wood to coated paper

| Coating technology | Sappi Fine Paper Europe | 3

Binders: Starches, Latex

products

Water

Process materials: Co-binders, optical

brightener, toning

colours, wet strength

agents, anti-foaming

agent, ...

Pigments: Kaolin (clay), chalk,

titanium dioxide, talcum,

synthetic pigments

Coating components

| Coating technology | Sappi Fine Paper Europe | 4

The surface of a gloss paper

Uncoated paper.

Surfaces

| Coating technology | Sappi Fine Paper Europe | 5

Uncoated paper

Structure of the surface

| Coating technology | Sappi Fine Paper Europe | 6

Calciumcarbonat

| Coating technology | Sappi Fine Paper Europe | 7

Clay

| Coating technology | Sappi Fine Paper Europe | 8

Caddy mill

| Coating technology | Sappi Fine Paper Europe | 9

Observation point caddy mill

| Coating technology | Sappi Fine Paper Europe | 10

CM 6 Ehingen

| Coating technology | Sappi Fine Paper Europe | 11

Coating machine

| Coating technology | Sappi Fine Paper Europe | 12

1 Uncoated paper web

2 Coater counter-roll

3 Coating colour sump

4 Application roll for coating colour

5 Blade

6 Paper web, coated on one side

Blade coating process with application roll

| Coating technology | Sappi Fine Paper Europe | 13

Coater

| Coating technology | Sappi Fine Paper Europe | 14

Coater

| Coating technology | Sappi Fine Paper Europe | 15

Paper

Coating layer

Application roll Distribution roll

1 2 3

3

2 1

Precoater

| Coating technology | Sappi Fine Paper Europe | 16

SDTA / LDTA-Coater

| Coating technology | Sappi Fine Paper Europe | 17

Matt coated paper.

The rough surface structure of such papers

is clearly visible.

Smooth and closed surface of a glossy,

especially coated art paper.

Surfaces

| Coating technology | Sappi Fine Paper Europe | 18

Matt coated surface

Surface structure

| Coating technology | Sappi Fine Paper Europe | 19

α1 α2 0 10 20 30 40 50 60 70

0,3

0,2

0,1

0,0

Angle α2 [degree]

Refl.

Matt sample

Gloss reflection - Matt sample

| Coating technology | Sappi Fine Paper Europe | 20

α1 α2 0 10 20 30 40 50 60 70

0,3

0,2

0,1

0,0

Angle α2 [degree]

Refl.

Semi-matt sample

Gloss reflection - Semi-matt sample

| Coating technology | Sappi Fine Paper Europe | 21

α1 α2 0 10 20 30 40 50 60 70

0,3

0,2

0,1

0,0

Angle α2 [degree]

Refl.

Glossy sample

Gloss reflection - Glossy sample

| Coating technology | Sappi Fine Paper Europe | 22

Top coating

Pre coating

Basis paper

Cross-section of the paper

| Coating technology | Sappi Fine Paper Europe | 23

Single - coated Double - coated Triple - coated

Basis – Paper 100 85 75

Pre – Coating (PM) 10

First – Coating (CM) 20 22

Top – Coating (CM) 35 30 28

Sum: g/m² 135 135 135

Compilation of the 135 gsm paper

| Coating technology | Sappi Fine Paper Europe | 24

Profil-Data

| Coating technology | Sappi Fine Paper Europe | 25

Developed and maintained by Technical Support

Sappi Fine Paper Europe

Contacts:

Oliver Kropacek (project leader)

Corry Olejniczak (administrator GTL)