GB2258427A - Method for specifying colours for colour printing. - Google Patents

Method for specifying colours for colour printing. Download PDF

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Publication number
GB2258427A
GB2258427A GB9112171A GB9112171A GB2258427A GB 2258427 A GB2258427 A GB 2258427A GB 9112171 A GB9112171 A GB 9112171A GB 9112171 A GB9112171 A GB 9112171A GB 2258427 A GB2258427 A GB 2258427A
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GB
United Kingdom
Prior art keywords
colour
sheets
imprinted
colours
loadings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9112171A
Other versions
GB2258427B (en
GB9112171D0 (en
Inventor
Ashley Keenes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ALDINE DESIGN SERVICES Ltd
Original Assignee
ALDINE DESIGN SERVICES Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ALDINE DESIGN SERVICES Ltd filed Critical ALDINE DESIGN SERVICES Ltd
Priority to GB9112171A priority Critical patent/GB2258427B/en
Publication of GB9112171D0 publication Critical patent/GB9112171D0/en
Publication of GB2258427A publication Critical patent/GB2258427A/en
Application granted granted Critical
Publication of GB2258427B publication Critical patent/GB2258427B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44D—PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES
    • B44D3/00—Accessories or implements for use in connection with painting or artistic drawing, not otherwise provided for; Methods or devices for colour determination, selection, or synthesis, e.g. use of colour tables
    • B44D3/003—Methods or devices for colour determination, selection or synthesis, e.g. use of colour tables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices

Landscapes

  • Thermal Transfer Or Thermal Recording In General (AREA)

Abstract

A method for specifying colours comprises imprinting a series of equal sized bars of the colours black, cyan, yellow and magenta at colour loadings of from 5% to 100% in 5% steps onto respective sheets of transparent material, e.g. polyvinyl, polyester or polyacetate material, overlaying one or more sheets such that imprinted areas overlap to provide a specific colour moving one or more of said sheets relative to the other sheets until a desired colour is obtained and then specifying the colour by reference to the respective colour loadings of the imprints forming the said colour. <IMAGE>

Description

METHOD FOR SPECIFYING COLOURS FOR COLOUR PRINTING The present-invention relates to an improved and simplified method for specifying colours for colour printing.
Currently colours for colour printing are specified by reference to what are known as process colour charts.
These charts provide a very wide range of colours based on mixtures of two or more of the basic colours, i.e. black, cyan, magenta and yellow at specified loadings per unit of area of, for example, 5, 10, 20 up to 100% (solid colour) of a single colour. Thus a mixture of cyan and yellow for a range of backings of 5-100% will give a range of greens on one chart and this may be overlaid with a black also in the range of 5-100% on another chart. Charts are also provided for the basic colours themselves.
These colour charts are expensive and have a limited application; they cannot, for example, show the direct effect of changing one colour in a multi-colour print, for example by showing the effect of changing a yellow colour to green without re-printing at different colour loadings.
We have now found an improved method for colour specification in which method each of the four basic colours, black, cyan, yellow and magenta are imprinted onto separate sheets of clear transparent material, for example polyvinyl, polyacetate or polyester sheets, in discreet equal sized areas on each sheet at a series of specified colour loadings per unit of surface area for example per square milimetre, overlaying one sheet on at least one other sheet such that the colour areas overlap and moving one sheet relative to the other until the colour mix provides the colour required, and then defining the colour by the relevant loadings noted on the sheets.
Each sheet of clear transparent material may be rectangular in shape and the basic colours imprinted in the form of a strip of eqispaced bars, say 14 x 40mm, 3mm apart at loadings of 100% down to 5X in 5 steps.
An illustration of a sheet used in the present invention is shown in the accompanying drawing In the drawing a sheet of clear transparent polyacetate is shown imprinted with 11 bars of black pigment a the colour loadings indicated beneath each bar. The sheet is imprinted by the standard method used in the preparation of colour charts. Sheets for cyan, yellow and magenta are prepared in a similar manner.
One particular advantage of this method of specifying a colour for printing is that the sheets may be overlaid on any white areas of a colour print to assess the impact of a different colour on the print and to determine the colour loading required for a colour change in that area.

Claims (4)

1. A method for colour specification wherein four basic colours1 black, cyan, yellow and magenta are each imprinted as a series of discrete areas on individual sheets of transparent material, each imprinted area defining a specific colour loading per unit of surface area, whereby at least one sheet may be overlaid on at least one other sheet such that imprinted areas overlap, the overlaid sheets moved in relation to each other until the confirmation of overlapping imprinted areas provides the desired colour, and defining the said colour by reference to the respective colour loadings of the overlapping imprinted areas forming the said colour.
2. ' A method according to claim 1 wherein the transparent sheets are polyvinyl, polyacetate or polyester material.
3. A method according to claim 1 or 2 wherein the imprinted areas are rectangular bars and the colour loadings range from 5% to 100% in 5% steps.
4. A method for colour specification substantially as herein described with reference to the drawing.
GB9112171A 1991-06-06 1991-06-06 Method for specifying colours for colour printing Expired - Fee Related GB2258427B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9112171A GB2258427B (en) 1991-06-06 1991-06-06 Method for specifying colours for colour printing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9112171A GB2258427B (en) 1991-06-06 1991-06-06 Method for specifying colours for colour printing

Publications (3)

Publication Number Publication Date
GB9112171D0 GB9112171D0 (en) 1991-07-24
GB2258427A true GB2258427A (en) 1993-02-10
GB2258427B GB2258427B (en) 1995-04-12

Family

ID=10696186

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9112171A Expired - Fee Related GB2258427B (en) 1991-06-06 1991-06-06 Method for specifying colours for colour printing

Country Status (1)

Country Link
GB (1) GB2258427B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998038044A2 (en) * 1997-02-28 1998-09-03 Roberto Olvera Camacho Method for obtaining a tabulation to display a range of colours which can be reproduced with accuracy
WO2000074955A1 (en) * 1999-06-04 2000-12-14 Universidad Complutense De Madrid Chromatic restoration method for works of art based on the use of color tables or charts as color reference system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4241520A (en) * 1979-03-05 1980-12-30 Norton Thomas K Color calculator
US4399353A (en) * 1981-07-23 1983-08-16 Adkins James K Color computer wheel
US4527895A (en) * 1983-01-25 1985-07-09 Gemdialogue Systems, Inc. Method of characterizing the colored appearance of a gemstone
US4801267A (en) * 1985-10-22 1989-01-31 Hans Von Loesch Display device for illustrating color mixtures

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4241520A (en) * 1979-03-05 1980-12-30 Norton Thomas K Color calculator
US4399353A (en) * 1981-07-23 1983-08-16 Adkins James K Color computer wheel
US4527895A (en) * 1983-01-25 1985-07-09 Gemdialogue Systems, Inc. Method of characterizing the colored appearance of a gemstone
US4801267A (en) * 1985-10-22 1989-01-31 Hans Von Loesch Display device for illustrating color mixtures

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998038044A2 (en) * 1997-02-28 1998-09-03 Roberto Olvera Camacho Method for obtaining a tabulation to display a range of colours which can be reproduced with accuracy
WO1998038044A3 (en) * 1997-02-28 1998-11-05 Camacho Roberto Olvera Method for obtaining a tabulation to display a range of colours which can be reproduced with accuracy
US6217337B1 (en) 1997-02-28 2001-04-17 Roberto Olvera-Camacho Method for obtaining a tabulation to display a range of colors which can be reproduced with accuracy
WO2000074955A1 (en) * 1999-06-04 2000-12-14 Universidad Complutense De Madrid Chromatic restoration method for works of art based on the use of color tables or charts as color reference system
ES2153785A1 (en) * 1999-06-04 2001-03-01 Univ Madrid Complutense Chromatic restoration method for works of art based on the use of color tables or charts as color reference system

Also Published As

Publication number Publication date
GB2258427B (en) 1995-04-12
GB9112171D0 (en) 1991-07-24

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19980606