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    COLOR MATCHING SURFACE COATINGS CONTAINING METALLIC PIGMENTS
    1.
    发明专利
    COLOR MATCHING SURFACE COATINGS CONTAINING METALLIC PIGMENTS 未知

    公开(公告)号：ZA746445B

    公开(公告)日：1976-05-26

    申请号：ZA746445

    申请日：1974-10-09

    Applicant: MOBIL OIL CORP

    Inventor： MCCARTY W ,  JONES K

    IPC: G01J3/46 ,  C09D7/00 ,  G01J3/50 ,  C09D

    Abstract: In the selection of metallic paint pigments to color match a standard metallic paint coating, the tri-stimulus coordinates of the coating are measured at a plurality of different viewing angles with respect to the surface. A colorimeter has a rotating plaque holder. Incident light passes through blue, green or red filters. The light is reflected from the plaque and is detected by a photocell. By changing the angle of the plaque, tri-stimulus coordinates of the plaque are measured at different viewing angles. The total reflectance of the coating on the plaque is measured in a spectrophotometer. From the measured tri-stimulus coordinates and the measured total reflectance, the measured diffuse and angular reflectance of the coating on the plaque is obtained. A model which relates both the diffuse and the angular reflectance to the concentration of paint pigments is generated on an automatic data processor. Least square fitting between measured and predicted diffuse and angular reflectance is used. A formulation program generates the concentrations of pigments to be used in the initial batch. Thereafter, a shading program successively generates the changes in pigment concentrations which give the best least squares fit to the standard coating.

    PROCESS AND APPARATUS FOR PRODUCING COLORED CHEMICAL COATINGS
    3.
    发明专利
    PROCESS AND APPARATUS FOR PRODUCING COLORED CHEMICAL COATINGS 未知

    公开(公告)号：ZA705516B

    公开(公告)日：1972-03-29

    申请号：ZA705516

    申请日：1970-08-10

    Applicant: MOBIL OIL CORP

    Inventor： MCCARTY W

    IPC: G02B27/00 ,  B41F33/10 ,  B44D3/00 ,  G01J3/46 ,  G01J3/50 ,  G05B15/00 ,  G06F17/00 ,  G06F19/00 ,  G06T11/00 ,  C09D

    Abstract: 1,272,167. Colour matching by computer. MOBIL OIL CORP. 15 Sept., 1970 [19 Sept., 1969], No. 44042/70. Heading G4A. A system for colour matching a sample includes a computer for selecting appropriate pigments from a set of pigments and for determining the concentration ratios of the selected pigments relative to a standard pigment (e.g. White). The reflectance of the sample is measured at a plurality of wavelengths, these values being fed to the computer as input. The pigment selection algorithm is illustrated by Fig. 1. The computer may be used additionally to control the pigment flow rate in a continuous pigment blending process as illustrated in Fig. 2 (not shown).

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