Pastes based on organic pigments for colourmatching of …€¦ · Pastes based on organic pigments for colourmatching of RAL shades Helio Beit Pigment Pastes - Your specialist for

Pastes based on organic pigments for colourmatching of RAL shades

Helio Beit Pigment Pastes - Your specialist for industrial applications

ICS Seminar 8th & 9th November

Who is Helio Beit?

- Company “Founded” 2015 (family owned)

- Previously operating as a part of Bollig & Kemper

- Experience since more than 35 years

- Specialists exclusively for producing pigment pastessuitable for systems of solvent-, water-, UV- & alkyd basis.

- Markets are classic coatings, plastics, glass, glues, mineral materials, UV nail gels etc.

- 250 t/year


History of RAL

- In 1925, the private sector and the German government of that time founded the

"Reichs-Ausschuss für Lieferbedingungen" – RAL

- 1927 Beginning of colour standardization with first RAL colour chart

- 1953 / 1961 Revision of the industrial standard RAL 840-HR Surface Semi gloss /dull

- 1986 Launch of the high gloss industrial standard RAL 841-GL

- 1993 Launch of the RAL DESIGN System


Structure of RAL 840 HR and RAL 841 GL

RAL 1… - Yellow colour shades

RAL 2… - Orange colour shades

RAL 3… - Red colour shades

RAL 4… - Violet colour shades

RAL 5… - Blue colour shades

RAL 6… - Green colour shades

RAL 7… - Grey colour shades

RAL 8… - Brown colour shades

RAL 9… - Black / White colour shades


We will give you a small overview about yellow, orange and redshades in the presentation.

Important tests in the grinding process are:


Particle size – Grindomter to measure the max. particle size

Results : for example < 10 µm

Colour shade in mixture with a standard white paint – Colour computer to measurethe difference to a standard sample

Results : ΔL / Δa / Δb ΔE = √ ΔL2 + Δa2 + Δb2

ΔC / Δh


Graphic of the CIELab – System

Colour Values L (lightness)

a (red – green axis)

b (yellow – blue axis)

C (Chroma)

h (Hue –angle)


RAL 1… Yellow colour shades

Common organic pigments are:

Colour Index Trade names Paste names

P Y 74 Irgalite (Sico ) Yellow ; Hansa Yellow; Heuco Yellow; Acetanil Yellow UN/UL/LW/UV 206

Characteristics : Pigment for standard industrial application Mid shade yellow for economic formulation

Disadvantage: Low temperature resistance, low light resitsance in mixture with white. Low oversprayfastness

Grinding : Due to the low temperature and solvent resitance , the grinding must be done very carefully.

High temperature and high sheare rates can destroythe pigment.

Results are lower chroma and lower colourstrength of the yellow paint Bad results in colourmatching of RAL shades like

Traffic Yellow RAL 1023



PY 138 Paliotol Yellow; Lysopac Yellow; Sinfast Yellow UN/UL/LW 208

Charateristics : organic greenish yellow pigment with good light – and weather fastness.

High chroma and a very pure shade

Good temperature resistanceand oversprayfastness.

Grinding : Colourstrength, chroma and colour shade depends on the minimum particle size

High shear rates are necessaryto developthe whole potential of the pigment.

The grinding machines must be veryclean for the pure shade of the pigment.

Risk: The pigment is expensive and if your grinding process is not perfect you will not achieve the maximum chroma and

colourstrength of the pigment Bad results in colourmatching of shades like RAL 1016, 1021, 1023



PY 151 HostapermYellow, Chromophtal Yellow , Monolite Yellow UN 207

Charateristics : organic pigment with good light – and weather fastness. ( mid shade – greenisch yellow )

High chroma and good colourstrength

Good temperature resistanceand oversprayfastness.

Grinding and risks similar to the PY 138


RAL 2… orange colour shades



P Y 83 NovopermYellow ; Monolite Yellow; Sinfast Yellow UN/UV 218 , 219

Characteristics : Pigment for standard industrial application Veryreddish shade yellow for economic formulation

The pigment is available in an opaque and transparent version.

Grinding : The cleanness of the grinding machines is very important for all reddish yellow pigments and orange pigments .

The grinding process has also a big influence on the colour shade of the pigment.

Abrasion of the milling beads and the surface of the machinery have to be avoided

Especially the colour values a* ( + a* means more red / - a* more green ) and

b* ( + b* means more yellow / - b* means more blue ) must be checked during the grinding process


Poor results in grinding of reddish-yellow and orange pigments are:

( In mixture with the standard white )

Δa - negative value pigment is too much green

Δb - negative value pigment is too much blue

As a consequence of this : Problems with the colour matching of pure orange shades like RAL 2004 – pure orange ;

RAL 2009 Traffic orange and also reddish yellow shades like 1028 Melon yellow


Colour Index Trade names paste names

P Y 139 Paliotol Yellow; Monolite Yellow; NovopermYellow UN/UL/LW/UV 216

Characteristics : Reddish yellow pigment with good wheather and light fastness.

Similar to the P Y 138 the grinding must be done very intensive to achieve the maximum colour strength and chroma ofthe pigment.

P O 36 NovopermOrange; Lysopac Orange; Sinfast Orange UN 326

Characteristics : Reddish orange pigment with good wheather and light fastness.

Suitable for reddish-orange shades like RAL 2001, 2002 and 2012

P O 67 Paliotol Orange UL/LW/UV 307

Characteristics : orange pigment with good wheather and light fastness close to full shade

Suitable for orange shades like RAL 2003, 2004 and 2008


RAL 3… Red colour shades



P R 112 Irgalite Red; Permanent Red; Sinfast Red UN/UL/LW 303

Characteristics : Pigment for standard industrial application Mid shade red for economic formulation

Disadvantage: Lower temperature resistance, low resitsanceagainst solvents, low oversprayfastness.

Grinding: In the grinding process high temperature and high shear sates should be avoided.

The pigment can be destroyed ( colourdtrength low , the mixture with Standard white to green )

You can not achieve pure red shades like RAL 3020



P R 170 NovopermRed ; Lysopac Red ; Sinfast Red UN/UV/LW 308

Characteristics : organic red pigment with high chroma and a verypure colour

Grinding: Careful grinding process , the equipment must be veryclean to keep the pure shade of the pigment.

The a-value (red-green axis ) must be checked during the grinding

P R 254 Irgazin Red, HosatapermRed, Monolite Red, Cinilex Red UN / LW 324

Characteristics : pigment based on the DPP-chemistry, highest light- and weather fastness of organic red pigments

The producer must check the development of the a-value during the grinding process.

Grinding: Risks and grinding information similar to P R 170



P R 122 HostapermPink; Lysopac Red; Monolite Red UN/UL/LW/UV 305

Characteristics : organic red pigment with high colourstrength and verygood light- and weather fastness.

In combination with TiO2 for bluisch red , pink and magenta shades.

Grinding: Pigment with high specific surface and therefore difficult in dispersing and wetting .

You need perfect equipment and experiance to achieve the maximum performance of the pigment.

Because of the high colourstrength of the pasteyou will have high effort in clleaning-process of the equipment.


Summary

Necessary tests of pigment-grindings are:

- Particle size

- Colourshade in Combination with TiO2 compared to standard

Some pigments for economic formulation can be destroyed in the grinding process

- Useful information are lower resistance against temperature, solvents and chemicals

- Low overspray fastness.

The cleanness of the equipment and a professional grinding process is very important for pigments

which are used to match bril lant yellow, orange and red colour shades


A paint-producer, who wants to do the whole grinding for his own needs a lot of expensive dispersingequipment.

Cleaning processes with high effort will be necessary to prepare the equipment.

Alternatives: Liquid pastes based on the pigments.

The risk of the production is on the side of the supplier of the pastes.

The producer of the pigmentpaste uses the perfect equipment in production.

The formulation of the paste is special designed for every different pigment to achieve themaximum performance.


Please note:

The mentioned types of pigments (Colour Index and Trade names) are only a smallselection of pigments,which are used in industrial paint production.

We think that they are good examples to show the relation between pigment, grinding and colourmatching.

If you have any question or need additional information, do not hesitate to contactus.


Thank you for your interest


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Pastes based on organic pigments for colourmatching of …€¦ · Pastes based on organic pigments for colourmatching of RAL shades Helio Beit Pigment Pastes - Your specialist for