RAL is a colour management system used in Europe that is created and administered by the German (RAL non-profit LLC), which is a subsidiary of the German . In colloquial speech, RAL refers to the RAL Classic system, mainly used for

varnish Varnish is a clear Transparency (optics), transparent hard protective coating or film. It is not to be confused with wood stain. It usually has a yellowish shade due to the manufacturing process and materials used, but it may also be pigmente ...

and

powder coating Powder coating is a type of coating that is applied as a free-flowing, dry powder. Unlike conventional liquid paint, which is delivered via an evaporating solvent, powder coating is typically applied electrostatically and then Powder coating#Curin ...

, but now plastics as well. Approved RAL products are provided with a hologram to make unauthorised versions difficult to produce. Imitations may show different hue and colour when observed under various light sources.

RAL colour space system

RAL Classic

In 1927, the German group (Imperial Committee for Delivery and Quality Assurance) invented a collection of forty colours under the name of "RAL 840". Prior to that date, manufacturers and customers had to exchange samples to describe a tint, whereas from then on they would rely on numbers. In the 1930s, the numbers were changed uniformly to four digits and the collection was renamed to "RAL 840 R" (R for revised). Around 1940, the RAL colours were changed to the four-digit system, as is customary. Army camouflage colours were always recognized by a "7" or "8" in the first place until 1944. With tints constantly added to the collection, it was revised again in 1961 and changed to "RAL 840-HR", which consists of 210 colours and is in use to this day. In the 1960s, the colours were given supplemental names to avoid confusion in case of transposed digits. At the international furnishing fair '' imm Cologne'', 13-19 January 2020, two new colours were presented in the Classic Collection: RAL 2017 RAL orange and RAL 9012 Cleanroom White. "RAL 840-HR" covered only matte paint, so the 1980s saw the invention of "RAL 841-GL" for glossy surfaces, limited to 193 colours. A main criterion for colours in the RAL Classic collection is to be of "paramount interest". Therefore, most of the colours in it are used on warning and

traffic sign Traffic signs or road signs are signs erected at the side of or above roads to give instructions or provide information to road users. The earliest signs were simple wooden or stone milestones. Later, signs with directional arms were introduc ...

s or are dedicated to government agencies and public services (for example: RAL 1004 - Swiss

Postal Service The mail or post is a system for physically transporting postcards, letters, and parcels. A postal service can be private or public, though many governments place restrictions on private systems. Since the mid-19th century, national postal sy ...

, RAL 1021 - Austrian Postal Service, RAL 1032 - German Postal Service). The first digit relates to the shade of the colour:

RAL F9

This collection, which follows the naming of RAL Classic, was invented in 1984. It is now made up of ten colours ( RAL 1039-F9 Sand beige, RAL 1040-F9 Clay beige, RAL 6031-F9 Bronze green, RAL 6040-F9 Light olive, RAL 7050-F9 Camouflage grey, RAL 8027-F9 Leather brown, RAL 8031-F9 Sand brown, RAL 9021-F9 Tar black and RAL 6031-F9 HR Bronze green semi-matt) used by the ' for

military camouflage Military camouflage is the use of camouflage by an Military, armed force to protect personnel and equipment from observation by enemy forces. In practice, this means applying colour and materials to military equipment of all kinds, including ...

coating.

RAL Design

In 1993 a new colour matching system was introduced, tailored to the needs of

architect An architect is a person who plans, designs, and oversees the construction of buildings. To practice architecture means to provide services in connection with the design of buildings and the space within the site surrounding the buildings that h ...

designer A designer is a person who plans the form or structure of something before it is made, by preparing drawings or plans. In practice, anyone who creates tangible or intangible objects, products, processes, laws, games, graphics, services, or exper ...

s and

advertisers Advertising is the practice and techniques employed to bring attention to a Product (business), product or Service (economics), service. Advertising aims to present a product or service in terms of utility, advantages, and qualities of int ...

. It started with 1,688 colours and was revised to 1,625 colours and again to 1,825 colours. The colours of RAL Classic and RAL Design do not intersect. Contrary to the preceding systems, RAL Design features no names and its numbering follows a scheme based on the CIELAB colour space, specifically cylindrical CIEHLC. Each colour is represented by seven digits, grouped in a triple and two pairs, representing

hue In color theory, hue is one of the properties (called color appearance parameters) of a color, defined in the CIECAM02 model as "the degree to which a stimulus can be described as similar to or different from stimuli that are described as ...

(000–360 degrees, angle in the CIELab colour wheel),

lightness Lightness is a visual perception of the luminance (L) of an object. It is often judged relative to a similarly lit object. In colorimetry and color appearance models, lightness is a prediction of how an illuminated color will appear to a stand ...

(same as in ''L''*''a''*''b''*) and chroma (relative saturation). The three numeric components of almost all RAL Design colours are multiples of 5, the majority are divisible by 10. ; Conversion from RAL Design number tuple to CIELAB :

\begin\text_\text &= \left(h_^, L^, C_^\right)\\
a^ &= C_^\cdot\cos\left(h_^\right)\\
 b^ &= C_^\cdot\sin\left(h_^\right)\end

: RAL 210 50 15 converts to ''L''* = 50, ''a''* = −12.99, ''b''* = −7.5, for instance.

RAL Effect

RAL Effect comprises 420 solid colours and seventy metallic colours. It is the first collection from RAL to be based on waterborne paint systems.

RAL Digital

RAL Digital is software that allows designers to navigate the RAL colour space.

References

External links

Official website
{{Colour topics Color space Standards of Germany 1927 in the arts 1927 introductions Color organizations Color schemes Construction standards German inventions