JP2004093522A - Glossiness reference plate for paint color preparation - Google Patents

Glossiness reference plate for paint color preparation Download PDF

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JP2004093522A
JP2004093522A JP2002258463A JP2002258463A JP2004093522A JP 2004093522 A JP2004093522 A JP 2004093522A JP 2002258463 A JP2002258463 A JP 2002258463A JP 2002258463 A JP2002258463 A JP 2002258463A JP 2004093522 A JP2004093522 A JP 2004093522A
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color
paint
glitter
toning
sample
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JP4234963B2 (en
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Naoki Shinoda
篠田 直樹
Toshiyuki Ogawa
小川 敏之
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Kansai Paint Co Ltd
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Kansai Paint Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a glossiness reference plate for paint color preparation useful for color preparation work of glossy paints, such as a metallic paint. <P>SOLUTION: The glossiness reference plate for paint color preparation comprises paint colors, each in a plurality of glossiness levels arranged in steps. Then, if the glossiness reference plates are prepared for a plurality of brightness levels, the glossiness reference plates thus prepared can be used as a set of the glossiness reference plates for paint color preparation. A color preparation work can be carried out, by visually comparing a coating film as a color preparation object with a set of the plates, to select an approximate reference and selecting a candidate paint blend from among a database registered in a computer in advance, on the basis of glossiness information of the reference and color data of the coating film. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、メタリック塗料などの光輝塗料の調色作業に有用な、塗料調色用光輝感見本色票に関する。本発明の色票は、特に自動車補修用塗料の調色作業に好適に使用できる。
【0002】
【従来の技術】
近年、自動車の塗色は、個人の好みの多様化、美粧性の向上の点からアルミニウム粉や光輝性マイカ粉が配合された光輝感のある塗色が増加している。この光輝感のある塗色を補修塗装するに際して、従来の測色計を用いたコンピュータ調色システムによる色合わせでは、調色精度が不十分であり、光輝感のある塗色に対してコンピュータによる精度の高い色合わせ方法はこれまでなかった。これまでの自動調色が人間の目視調色に比較して劣る要因の1つとして、色が合っていてもアルミニウム粉などの光輝顔料の粒子感やキラキラとした質感、いわゆる「ミクロ光輝感」と呼ばれるアルミの質感情報を取り入れることができなかった点が挙げられる。またこのような光輝感のある塗色は、経験の少ない調色作業者にとっては目視調色も困難であるといった問題があった。
【0003】
そこで本出願人は、光輝感のある塗色に対しても、精度高く色合わせできるコンピュ−タ調色方法を先に提案した(例えば、特許文献1、特許文献2参照。)。これらの方法によれば、ミクロ光輝感を測定する測色計を用いて精度高く色合わせができ、経験の少ない調色作業者でも容易に調色作業が行なえる。
【0004】
【特許文献1】
特開2001−221690号公報
【特許文献2】
国際公開第02/004567号パンフレット
【0005】
【発明が解決しようとする課題】
しかしながら、上記ミクロ光輝感を測定する測色計はコスト高であり、また実用面での課題もあるため、上記調色方法が大小多数の一般板金塗装業者を抱える自動車補修業界で受け入れられるかどうかは未知数である。
【0006】
本発明の目的は、上記の如きミクロ光輝感を測定する機器を使用しなくとも、塗色のメタリック感などの光輝感を判定でき、特にそのミクロ光輝感情報をコンピュータ調色システムに取り入れて調色作業を行なうのに有用な、塗料調色用光輝感見本色票を提供することにある。
【0007】
【課題を解決するための手段】
即ち本発明は、
1.同一明度塗色で、複数水準の光輝感を有する各塗色見本を段階的に並べて配置してなることを特徴とする塗料調色用光輝感見本色票、
2.複数水準の明度塗色において、夫々、複数水準の光輝感を有する各塗色見本を段階的に並べて配置してなる塗料調色用光輝感見本色票集、
3.隣接する水準が、人間の目視による識別限界に応じて選択される1又は2項記載の塗料調色用光輝感見本色票、
4.光輝感が、ミクロ光輝感の測定値によって分類される1又は2項の塗料調色用光輝感見本色票、
5.ミクロ光輝感の測定値が、光学的測定機によって測定されたハイライトの粒子感(HG)及びハイライトのキラキラ感(HB)の測定値である4項の塗料調色用光輝感見本色票、
6.(1)1ないし5のいずれか1項に記載の塗料調色用光輝感見本色票集を用いて、調色対象塗膜の光輝感を目視で比較して近似水準の見本を選択し、該見本の光輝感情報を得る工程、(2)調色対象塗膜の色データを得る工程、及び(3)前工程で得た光輝感情報と色データを基に、予めコンピュータに登録されたデータベースの中から候補塗料配合を選び出す工程を含む近似色検索システム、
7.6項に記載の近似色検索システムによって選択された候補配合に従って調色作業をしてなる光輝塗料の調色方法、
に関する。
【0008】
【発明の実施の形態】
塗料調色用光輝感見本色票
本発明の塗料調色用光輝感見本色票は、同一明度塗色で、複数水準の光輝感を有する各塗色見本を段階的に並べて配置してなるものである。また該色票を、複数水準の明度ごとに作成して、塗料調色用光輝感見本色票集として使用することが好適である。色票集の明度水準の選択は、高明度域から低明度域までの間で適宜行われ、通常、等間隔で2〜10種、好ましくは3〜7種程度選ばれることが望ましい。
【0009】
上記色票は、各塗色の光輝塗料を支持層、例えば紙、木板、プラスチック板、金属板などの上に塗布・乾燥して作成した色紙や色板を各塗色見本とし、これを段階的に並べて光輝感のグラデーションを形成するものである。
【0010】
上記色票を構成する各塗色見本は、同一明度となるように、光輝塗料の顔料組成において、アルミフレーク、金属酸化物被覆マイカフレーク、金属酸化物被覆人工マイカフレーク、金属酸化物被覆アルミナフレークなどから選ばれる各種光輝顔料と黒色顔料の配合組成を調整することで得られる。また各明度水準ごとに色票集を作成する場合には、各色票間で同一水準の光輝感を有する塗色見本となるように、同一水準では同一材質や粒径の光輝顔料種を用いて光輝塗料の配合組成を調整することが好適である。
【0011】
各塗色見本は、支持層上に形成された光輝塗膜上に、クリヤー塗膜が塗り重ねられていても良い。
【0012】
上記色票において、隣接する水準は、人間の目視による光輝感の識別限界に応じて、素人でも一目で各水準の違いを判断できるように選択されることが望ましい。このような光輝感の各水準としては、コンピュータ調色システムへの対応の点から、光輝感の指標であるミクロ光輝感の測定値をグループ化し、その分類された各グループ内の中心点を夫々選択することが好適である。その際に、ミクロ光輝感の測定値グループが重ならないようにすることが明確な目視選別の点から望ましい。
【0013】
ミクロ光輝感とは、アルミフレーク、光輝性マイカフレークなどの光輝顔料を含む塗色に発現する固有の光輝性の質感を意味する。例えばアルミ、マイカ等の目の粗さやギラギラ、キラキラした輝き、ザラザラした質感、粒子の大きさなどが該当する。
【0014】
ミクロ光輝感の測定値には、光学的測定機によって測定されたハイライトの粒子感(HG)、ハイライトのキラキラ感(HB)、シェードのキラキラ感(SB)、低照度条件でのハイライトのキラキラ感(HB)などの測定値があるが、本発明で採用されるミクロ光輝感の測定値は、調色での実用面から、特にハイライトの粒子感(HG)及びハイライトのキラキラ感(HB)の測定値であることが望ましい。HGは、Hi−light Graininessの略称であり、HBは、Hi−light Brillianceの略称である。
【0015】
上記HG及びHGの測定は、これらを測定可能な装置であれば特に制限ないが、通常、CCDカメラと画像解析装置と(可変)光源とを具備するシステムを用いて行われれる。非測定面に対して垂線上に設置したCCDカメラで、光源によってカメラから見て入射角15〜45°の光で照明された非測定面が撮影され、得られた画像が、画像解析装置によって画像処理されてHG値及びHG値の数値を得るものである。具体例の詳細は、関西ペイント株式会社報文、塗料の研究、No.138 July 2002年 p8〜24参照。
【0016】
自動車の実在塗色の上記HGとHBの測定値を、同一明度においてマップ化した一事例を図1に示す。各塗色のHGとHBは帯状に分布しており、目視との相関で高HG・HB値域から低HG・HB値域までの間で光輝感水準の選択が適宜行われ、目視による選別可能な種類で通常、3〜10種、好ましくは4〜8種程度選ばれることが望ましい。ここで、目視は、塗色を正面から観察するハイライトの条件にて行なう。
【0017】
ここで、本発明の塗料調色用光輝感見本色票集の好適な一実施の態様を図2に示す。図2において、色票集は、夫々、明度Lが10、30、50、70及び90の5水準で構成されており、各色票は、同一明度で、a〜fの6水準の光輝感を有する塗色見本を段階的に並べて配置している。a〜fの各水準は、人間の正面目視によって夫々下記のように識別可能に選択されており、各見本毎に見本番号が見本上段もしくは裏面等に記載されている。該見本番号から、その見本塗色のHG及びHBの測定値が抽出可能となる。また、各見本毎に直接そのHG及びHBの測定値を見本上段もしくは裏面等に記載しておいても良い。尚、HG及びHBの測定値は夫々、通常、0〜100の間の数値である。
【0018】
[粒子が大きい(粗い)、HG値大 〜
a>b>c>d>e>f 〜  粒子が小さい、HG値小]
[輝き(キラキラ感)大、HB値大 〜
a>b>c>d>e>f 〜  輝き(キラキラ感)小、HB値小]
【0019】
また、各明度の色票間では、例えば明度L70の見本aと明度L90の見本aとでは同一光輝材質を採用しているが、そのHG値及びHB値のレベルは異なっており、明度L90の見本aの方が大きい。高明度域と低明度域では光輝材配合量にも差があるので、光輝感の同一水準においてHG値及びHB値は、L10<L30<L50<L70<L90の順で大きくなる。
【0020】
近似色検索システム
本発明の近似色検索システムは、(1)上記塗料調色用光輝感見本色票集を用いて、調色対象塗膜の光輝感を目視で比較して近似水準の見本を選択し、該見本の光輝感情報を得る工程、(2)調色対象塗膜の色データを得る工程、及び(3)前工程で得た光輝感情報と色データを基に、予めコンピュータに登録されたデータベースの中から候補塗料配合を選び出す工程を含むものであり、さらに必要に応じて工程(3)の後に、(4)色合わせ計算ロジックを作動させて、工程(3)で選択された候補塗料配合を修正する工程を含めることができる。以下、各工程について順次説明する。
【0021】
工程(1):
まず、調色対象(実車など)塗膜と同程度の明度を有する塗料調色用光輝感見本色票を選択し、該調色対象の光輝感を目視で比較して近似水準の見本を選択する。目視は、点照射型のライトを用いて調色対象及び見本色票を照射し、ほぼ正面から観察する。
【0022】
次いで上記で選択した見本塗色のHG値とHB値を光輝感情報の初期値としてコンピュータに入力する。必要に応じて、これらHG値とHB値を正確な実車明度での値に補正して初期値としても良い。
【0023】
上記色票による光輝感情報の入力は、後述の工程(2)における多角度測色計などの公知の測色計による色データ情報を補完するものであり、例えば特開2001−221690号公報に開示のようなミクロ光輝感を測定する機器を使用せずともコンピュータによって色合わせ計算を行なうことを可能とするものである。
【0024】
工程(2):
多角度測色計などの公知の測色計で測定して調色対象塗膜(基準色)の色データを得る工程である。自動車補修などの補修塗装において、補修塗膜を形成した際、補修塗装部の塗膜と補修塗装部近傍の塗膜の色との差が目視で認められ難いことが必要であることから、上記基準色としては、通常、補修塗装部近傍の塗膜の色であることが適している。
【0025】
上記多角度測色計では、2以上の角度条件、通常、2〜4の角度条件、すなわち、測定光の入射角が異なるか、又は鏡面反射軸と受光軸とのなす角度である受光角度が異なる2以上の条件で測定を行なう。上記鏡面反射軸とは、入射角と反射角とが同じ角度であるときの反射角を形成する軸、例えば入射角が45度の場合、反射角が45度である軸である。
【0026】
受光角度を変化させる場合、その角度条件は特に限定されるものではないが、通常、角度条件が2の場合には、上記受光角度が15〜30度及び75〜110度の各角度範囲のうちの各1ずつであること、また、角度条件が3の場合には、上記受光角度が15〜30度、35〜60度及び75〜110度の各角度範囲のうちの各1ずつであること、さらに、角度条件が4の場合には、上記受光角度が15〜30度、35〜60度、70〜80度及び90〜110度の各角度範囲のうちの各1ずつであることが目視による色の判断との対応がとれやすいことから好適である。
【0027】
上記調色対象の基準色を各角度条件によって測定した色データである各測定値(角度基準測定値)は、明度、彩度、色相を表すか、計算できるなど、色を特定できるものであればよく、例えば、XYZ表色系(X、Y、Z)、L* a* b* 表色系(L*、a*、b*値)、ハンターLab表色系(L、a、b値)、CIE(1994)に規定されるL* C* h表色系(L*値、C*値、h値)、マンセル表色系(H、V、C)などによって表すことができる。なかでも、L* a* b*表色系又はL*C* h表色系による表示が自動車補修塗装分野を含む工業分野での色の表示において一般的である。
【0028】
また光輝塗色では、上記多角度測色計で測定される受光角度25度のL* と受光角度75度のL* の比で表現できる、マクロな光輝感としてフリップフロップ(FF)値を得ることができる。これも色データとして有効に使用可能である。
【0029】
工程(3):
前工程で得た光輝感情報(HG値、HB値などのミクロ光輝感データ)と色データを基に、予めコンピュータに登録されたデータベースの中から候補塗料配合を選び出す工程である。
【0030】
本発明の近似色検索システムに使用するコンピュータには、複数の塗料配合、該各塗料配合に対応した色データとミクロ光輝感データ、複数の原色塗料の色特性データとミクロ光輝感特性データ、及び必要に応じて、複数の色番号と該色番号に対応した各塗料配合が登録されており、コンピュータは該塗料配合及び該各データを利用した色合わせ計算ロジックが作動するようになっている。
【0031】
コンピュータに登録されている各塗料配合に対応した色データは、各塗料から得られる塗膜の多角度測色計による測色データであることができる。
【0032】
コンピュータに登録されている原色塗料の色特性データとしては、例えば、原色塗料のK値(光吸収係数)、S値(光散乱係数)などであることができる。上記K値及びS値は、例えば、原色塗料及び原色塗料のうすめ色の測色データを数値処理して得ることができる。
【0033】
コンピュータに必要に応じて登録される上記色番号は、通常、塗装物品製造メーカー毎に指定された色コード番号であり、その色番号に応じて、補修塗装する際の、塗料配合が登録されている。この塗料配合は、一つの色番号について一つ又は一組のみであることができるが、実績配合なども含まれることができ複数個又は複数組の塗料配合が登録されていてもよい。これらの塗料配合毎に、形成塗膜の多角度測色計による測色データもコンピュータに予め登録されている。
【0034】
本工程では、前工程で得た基準色の色データ及びHG値・HB値と、予めコンピュータに登録された塗料配合に対応した色データ及びミクロ光輝感データをコンピュータにて比較し、登録された該塗料配合の色とHG値・HB値の整合の度合いを指数化し、候補塗料配合を選択する。候補塗料配合の選択にあたっては、基準色との色及びHG値・HB値の整合の度合い、配合データなどを勘案するなどして最も合理的と思われるものを適宜選択することができる。この選択方法は特に限定されるものではない。候補塗料配合は、例えば、基準色との色差及びHG値・HB値の整合度合いが一定範囲内にあるもの中から選択することが好適である。
【0035】
また、本工程では、予めコンピュータに登録された色番号の中から基準色の色番号と同じ色番号の少なくとも一つの塗料配合の色データとミクロ光輝感データとを選び出し、選び出された塗料配合の色データとミクロ光輝感データと、基準色の色データ及びHG値・HB値とを比較し、上記選び出された塗料配合の色とHG値・HB値の整合度合いを指数化し、候補塗料配合を選択する方法を採っても良い。
【0036】
工程(4):
色合わせ計算ロジックを作動させて、工程(3)で選択された候補塗料配合を修正する工程である。
【0037】
本工程では、複数の塗料配合、該各塗料配合に対応した色データとミクロ光輝感データ、複数の原色塗料の色特性データとミクロ光輝感特性データが登録されたコンピュータを用いて、該塗料配合及び該各データを利用した色合わせ計算ロジックを作動させて、工程(3)で選択された候補塗料配合を修正して、基準色にさらに近づけた修正配合を得るものである。
【0038】
本発明では、上記近似色検索システムによって選択された候補配合に従って、光輝塗料の調色作業を行なうことができる。本発明の調色方法では、上記工程(3)で得られる候補塗料配合又は工程(4)で得られる修正配合を電子天秤に伝達する工程を有していてもよい。
【0039】
上記電子天秤への配合の伝達は、電話回線、光ケーブルなどを利用して行うことができる。この伝達された配合に基いて、電子天秤を使用して調色用塗料を配合することができる。この調色用塗料を塗装して調色経過塗板を作成することによって、この塗料が合格か否かを判断することができる。この判断は、測色計による調色経過塗板の色データと基準色の色データとの差、例えばL* a* b* 表色系におけるΔE* が許容範囲内であるか否かを判定するとともに、光輝感が許容範囲内であるか否かを目視で判定することによる。不合格であれば、この調色用塗料の配合、調色経過塗板の色データとHG値・HB値に基づいて、色合わせ計算ロジックを作動させて再び修正配合を得ることができる。
【0040】
【実施例】
以下、実施例を挙げて本発明をさらに具体的に説明する。なお、本発明は実施例に限定されるものではない。
【0041】
実施例1
シルバーメタリックA色塗膜面を補修塗装するにあたり、補修部周辺の塗色を基準色とし、この基準色について、関西ペイント(株)製の多角度測色計「Van−VanFAセンサー」にて鏡面反射軸と受光軸のなす角度が25度、45度、75度の3角度条件にて色測定を行なった。その測色値は下記表1のとおりであった。
【0042】
【表1】

Figure 2004093522
【0043】
また光輝感については、図2のような光輝感6水準、明度5水準の塗料調色用光輝感見本色票集を用いて、補修部周辺の塗色と同程度の明度L90を有する塗料調色用光輝感見本色票を選択し、該調色対象の光輝感を目視で比較して近似水準の見本L90−eを選択した。この見本色票L90−eのHG値は59.9、HB値は39.1である。
【0044】
上記で得たシルバーメタリック色の測色値と選択した見本塗色のHG値とHB値を光輝感情報の初期値として、関西ペイント(株)製のコンピュータ・カラー・マッチング調色装置「Van−VanFAステーション」に入力した。
【0045】
ここで、「Van−VanFAステーション」は、複数の原色塗料の色特性データとミクロ光輝感特性データが登録されており、該各塗料配合及び該各データを利用した色合わせ計算ロジックが作動するコンピュータとして用いた。
【0046】
上記調色装置において、予め登録されたデータとの整合の度合いを調べ、整合性指数の小さい順(各データのズレ幅の総和が小さい順)にデータベースの中から候補塗料配合を1位から5位まで選び出した。各候補塗料配合の塗色と基準色とを目視で比較したところ、その候補順位通りに良好な色一致性を有していた。この1位配合を出発配合として調色経過塗装板を作成し、調色作業を行なった。
【0047】
これに対して、シルバーメタリック色の測色値のみを調色装置に入力して、上記と同様に予め登録されたデータとの整合の度合いを調べ、整合性指数の小さい順(各データのズレ幅の総和が小さい順)にデータベースの中から候補塗料配合を1位から5位まで選び出したところ、目視判定では2位と5位の候補塗料配合の塗色の光輝感が基準色の光輝感よりもやや強めであった。これは色特性データのみの整合となるために、色味の近い候補色から選択され色味は合っていても光輝感の異なる塗色が検索されてしまうことによる。
【0048】
本発明の実施例によれば、簡便な見本色票を用いて、そのHG値とHB値を入力することで、光輝感の異なる塗色が候補塗料配合の上位に選び出されることが避けることが可能である。
【0049】
【発明の効果】
本発明の塗料調色用光輝感見本色票によれば、高価なミクロ光輝感を測定する機器を使用しなくとも、塗色の光輝感を容易に判定でき、そのミクロ光輝感情報をコンピュータ調色システムに取り入れて精度良く調色作業を行なうことが可能である。
【図面の簡単な説明】
【図1】自動車の実在塗色のHGとHBの測定値を、同一明度においてマップ化した一事例である。
【図2】本発明の塗料調色用光輝感見本色票集の好適な一実施の態様を示す図である。[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a glitter sample color chart for paint toning, which is useful for toning work of glitter paint such as metallic paint. The color chart of the present invention can be suitably used particularly for the color matching operation of a paint for repairing automobiles.
[0002]
[Prior art]
2. Description of the Related Art In recent years, glittering paint colors containing aluminum powder and glittering mica powder have been increasing from the viewpoint of diversification of personal preference and improvement of aesthetics for paint colors of automobiles. When repairing this brilliant paint color, the color matching by a computer toning system using a conventional colorimeter is insufficient in toning accuracy, and the brilliant paint color is applied by a computer. There has never been a highly accurate color matching method. One of the factors that make automatic toning inferior to human visual toning is that even if the colors match, the particle feeling of glitter pigments such as aluminum powder and the glittering texture, the so-called “micro glitter” It was not able to take in the information on the texture of aluminum, which is called "aluminum". Further, such a brilliant paint color has a problem that it is difficult for a color-toning worker with little experience to perform visual color-toning.
[0003]
Therefore, the present applicant has previously proposed a computer toning method capable of performing high-accuracy color matching even for a brilliant paint color (for example, see Patent Documents 1 and 2). According to these methods, color matching can be performed with high accuracy using a colorimeter for measuring micro-brightness, so that a toning operator with little experience can easily perform toning work.
[0004]
[Patent Document 1]
JP 2001-221690 A [Patent Document 2]
WO 02/004567 pamphlet [0005]
[Problems to be solved by the invention]
However, since the colorimeter for measuring the micro-brightness is costly and has practical problems, whether the above-mentioned toning method is acceptable in the automobile repair industry having many large and small general sheet metal coating companies. Is unknown.
[0006]
It is an object of the present invention to determine the glitter such as the metallic color of a paint color without using a device for measuring the micro glitter as described above. In particular, the micro glitter information is incorporated into a computer toning system and adjusted. An object of the present invention is to provide a glitter sample color chart for paint toning, which is useful for performing color work.
[0007]
[Means for Solving the Problems]
That is, the present invention
1. A glitter sample color chart for paint toning, characterized in that each paint sample having a plurality of levels of glitter is arranged in stages with the same lightness paint color,
2. In a plurality of levels of lightness paint colors, each paint color sample having a plurality of levels of glitter is arranged in a step-by-step manner, and a color sample for paint toning glitter samples,
3. 3. The glitter sample color chart for paint toning according to 1 or 2, wherein the adjacent levels are selected according to a human visual recognition limit.
4. The glitter sample color chart for paint toning according to 1 or 2, wherein the glitter is classified according to the measured value of the micro glitter.
5. 4. The glitter sample color chart for paint toning according to item 4, wherein the measured value of the micro glitter is the measured value of the graininess (HG) of the highlight and the glitter (HB) of the highlight measured by an optical measuring instrument. ,
6). (1) Using the glitter sample color chart collection for paint toning as described in any one of 1 to 5, visually compare the glitter of the toning target coating film and select a sample of an approximate level, The step of obtaining the glitter information of the sample, the step of (2) the step of obtaining color data of the coating film to be subjected to toning, and the step of (3) registering in the computer in advance based on the glitter information and the color data obtained in the previous step. An approximate color search system that includes the process of selecting candidate paint formulations from the database,
A method for toning a glitter paint, the method comprising performing a toning operation in accordance with the candidate mixture selected by the approximate color search system according to 7.6,
About.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Glitter sample color chart for paint toning The glitter sample color chart for paint toning of the present invention has the same lightness paint color, and arranges each paint color sample having a plurality of levels of glitter in a stepwise manner. It is made. In addition, it is preferable that the color chart is prepared for each of a plurality of levels of lightness, and is used as a gloss chart sample color chart for paint toning. The selection of the lightness level of the color chart collection is appropriately performed from the high lightness region to the low lightness region, and it is usually desirable to select about 2 to 10 kinds, preferably about 3 to 7 kinds at regular intervals.
[0009]
The above-mentioned color charts are prepared by applying and drying a glitter paint of each coating color on a support layer, for example, paper, wood board, plastic board, metal board, etc. Are arranged side by side to form a gradation of glitter.
[0010]
Each paint sample constituting the above color chart has an aluminum flake, a metal oxide-coated mica flake, a metal oxide-coated artificial mica flake, and a metal oxide-coated alumina flake in the pigment composition of the glitter paint so as to have the same lightness. It can be obtained by adjusting the composition of various bright pigments and black pigments selected from the above. When creating a color chart collection for each lightness level, use a bright pigment type of the same material and particle size at the same level so as to obtain a paint color sample having the same level of glitter between each color chart. It is preferable to adjust the composition of the glitter paint.
[0011]
In each coating color sample, a clear coating film may be applied over a bright coating film formed on the support layer.
[0012]
In the above color chart, it is desirable that the adjacent levels are selected so that even a layman can judge the difference of each level at a glance according to the discrimination limit of the brilliancy visually observed by a human. As for each level of such brilliancy, measured values of micro brilliancy, which is an index of brilliancy, are grouped from the viewpoint of compatibility with a computer toning system, and the center point in each of the classified groups is respectively defined. It is preferred to choose. At that time, it is desirable from the viewpoint of clear visual selection that the measurement value groups of the micro glitter are not overlapped.
[0013]
The micro glitter means a unique glitter texture that appears in a coating color containing a glitter pigment such as aluminum flake and glitter mica flake. For example, the roughness of the eyes of aluminum, mica, etc., glare, brilliant shine, rough texture, particle size, and the like are applicable.
[0014]
The measured values of the micro-brightness include the graininess of highlight (HG), the glitter of highlight (HB), the glitter of shade (SB), and the highlight under low illuminance conditions measured by an optical measuring instrument. There are measured values such as glitter (HB), but the measured value of the micro-brightness employed in the present invention is, in terms of practical use in toning, particularly the graininess (HG) of highlights and the glitter of highlights. Desirably, it is a measured value of the feeling (HB). HG is an abbreviation for Hi-light Graininess, and HB is an abbreviation for Hi-light Brilliance.
[0015]
The measurement of HG and HG is not particularly limited as long as it is an apparatus capable of measuring them, but is usually performed using a system including a CCD camera, an image analyzer, and a (variable) light source. A non-measurement surface illuminated with light having an incident angle of 15 to 45 ° as viewed from the camera by a light source is photographed by a CCD camera installed perpendicular to the non-measurement surface, and the obtained image is processed by an image analyzer. Image processing is performed to obtain an HG value and a numerical value of the HG value. Details of specific examples can be found in Kansai Paint Co., Ltd. 138 July 2002, pp. 8-24.
[0016]
FIG. 1 shows an example in which the measured values of HG and HB of the actual paint color of a car are mapped at the same brightness. The HG and HB of each paint color are distributed in a band shape, and the luminosity level is appropriately selected from a high HG / HB value range to a low HG / HB value range in correlation with visual observation, and can be visually selected. In general, it is desirable to select 3 to 10 types, preferably 4 to 8 types. Here, the visual observation is performed under the condition of highlight for observing the paint color from the front.
[0017]
Here, a preferred embodiment of the glitter sample color chart collection for paint toning of the present invention is shown in FIG. In FIG. 2, the color chart collection is composed of five levels of lightness L of 10, 30, 50, 70 and 90, respectively, and each color chart has the same brightness and six levels of luminosity of a to f. The paint color samples are arranged step by step. Each of the levels a to f is selected so as to be identifiable as follows when viewed from the front by a human, and the sample number is described on the sample upper row or the back side for each sample. From the sample number, the measured values of HG and HB of the sample paint color can be extracted. Further, the measured values of HG and HB may be described directly on the upper side or the back side of each sample for each sample. In addition, the measured values of HG and HB are usually numerical values between 0 and 100, respectively.
[0018]
[Large (coarse) particles, high HG value ~
a>b>c>d>e> f ~ small particles, low HG value]
[Large brightness (glitter), high HB value ~
a>b>c>d>e> f ~ small brightness (glitter), small HB value]
[0019]
Also, between color patches of each lightness, for example, the same bright material is used for the sample a with the brightness L70 and the sample a with the brightness L90, but the HG value and the HB value level are different, and the brightness L90 is different. Sample a is larger. Since there is also a difference in the amount of the glittering material between the high brightness range and the low brightness range, the HG value and the HB value increase in the order of L10 <L30 <L50 <L70 <L90 at the same level of the brightness.
[0020]
Approximate color search system The approximate color search system according to the present invention is based on (1) using the above-mentioned glitter color sample collection for paint toning, visually comparing the glitter of the coating film to be toned with approximation. A step of selecting a sample of a standard and obtaining glitter information of the sample, (2) a step of obtaining color data of a coating film to be subjected to toning, and (3) a step of obtaining the glitter information and color data obtained in the previous step. And a step of selecting a candidate paint formulation from a database registered in a computer in advance. If necessary, after the step (3), (4) the color matching calculation logic is operated to execute the step (3). And correcting the candidate paint formulation selected in (1). Hereinafter, each step will be sequentially described.
[0021]
Step (1):
First, select a glitter sample color chart for paint toning with the same level of brightness as the coating film of the toning target (such as an actual vehicle), compare the glitter of the toning target visually, and select a sample of an approximate level. I do. Visual observation is performed by irradiating the toning target and the sample color chart using a point-irradiation type light, and observing from almost the front.
[0022]
Next, the HG value and HB value of the sample paint color selected above are input to the computer as initial values of the glitter information. If necessary, the HG value and the HB value may be corrected to values at an accurate actual vehicle brightness and used as initial values.
[0023]
The input of the brilliancy information by the color chart complements the color data information by a known colorimeter such as a multi-angle colorimeter in the step (2) described later, and is described in, for example, JP-A-2001-221690. The present invention makes it possible to perform a color matching calculation by a computer without using a device for measuring micro glitter as disclosed.
[0024]
Step (2):
This is a step of obtaining color data of the coating film (reference color) to be measured by measuring with a known colorimeter such as a multi-angle colorimeter. In the repair painting such as automobile repair, when the repair coating film is formed, since it is necessary that the difference between the color of the coating film in the repair coating portion and the color of the coating film in the vicinity of the repair coating portion is required to be hardly visually recognized, Usually, it is suitable that the reference color is the color of the coating film near the repair coating portion.
[0025]
In the multi-angle colorimeter, two or more angle conditions, usually two to four angle conditions, that is, the incident angle of the measurement light is different, or the light receiving angle that is the angle between the specular reflection axis and the light receiving axis is The measurement is performed under two or more different conditions. The specular reflection axis is an axis that forms a reflection angle when the incident angle and the reflection angle are the same angle. For example, when the incident angle is 45 degrees, the reflection angle is 45 degrees.
[0026]
When changing the light receiving angle, the angle condition is not particularly limited. However, when the angle condition is 2, the light receiving angle is usually 15 to 30 degrees and 75 to 110 degrees. When the angle condition is 3, the light receiving angle is 15 to 30 degrees, 35 to 60 degrees, and 75 to 110 degrees. Further, when the angle condition is 4, it is visually confirmed that the light receiving angle is one in each of the angle ranges of 15 to 30 degrees, 35 to 60 degrees, 70 to 80 degrees, and 90 to 110 degrees. This is preferable because it is easy to correspond to the determination of the color.
[0027]
Each measurement value (angle reference measurement value) which is color data obtained by measuring the reference color of the toning target under each angle condition is one that can specify a color, such as representing brightness, saturation, hue, or calculating. For example, an XYZ color system (X, Y, Z), an L * a * b * color system (L *, a *, b * value), a Hunter Lab color system (L, a, b value) ), L * C * h color system (L * value, C * value, h value) defined by CIE (1994), Munsell color system (H, V, C), and the like. Above all, the display using the L * a * b * color system or the L * C * h color system is common in the display of colors in the industrial field including the automotive repair coating field.
[0028]
In the glitter paint color, a flip-flop (FF) value is obtained as a macro glitter that can be expressed by the ratio of L * at a light reception angle of 25 degrees measured by the multi-angle colorimeter and L * at a light reception angle of 75 degrees. be able to. This can also be used effectively as color data.
[0029]
Step (3):
Based on the glitter information (micro glitter data such as HG value and HB value) obtained in the previous step and the color data, this is a step of selecting a candidate paint formulation from a database registered in a computer in advance.
[0030]
The computer used in the approximate color search system of the present invention includes a plurality of paint formulations, color data and micro glitter data corresponding to each paint formulation, a plurality of primary color paint color property data and micro glitter property data, and If necessary, a plurality of color numbers and paint compositions corresponding to the color numbers are registered, and the computer operates color matching calculation logic using the paint compositions and the respective data.
[0031]
The color data corresponding to each paint composition registered in the computer can be colorimetric data of a paint film obtained from each paint by a multi-angle colorimeter.
[0032]
As the color characteristic data of the primary color paint registered in the computer, for example, a K value (light absorption coefficient), an S value (light scattering coefficient), and the like of the primary color paint can be used. The K value and the S value can be obtained, for example, by numerically processing the colorimetric data of the primary color paint and the light color of the primary color paint.
[0033]
The color numbers registered in the computer as necessary are usually color code numbers specified by each coated article manufacturer, and the paint composition at the time of repair painting is registered according to the color number. I have. This paint composition can be one or only one set for one color number, but can also include actual compositions and the like, and a plurality or plural sets of paint compositions may be registered. For each of these paint formulations, colorimetric data of the formed coating film by a multi-angle colorimeter is also registered in the computer in advance.
[0034]
In this step, the color data and the HG value / HB value of the reference color obtained in the previous step were compared with the color data and micro glitter data corresponding to the paint composition registered in the computer in advance by the computer, and were registered. The degree of matching between the color of the paint composition and the HG value / HB value is indexed, and a candidate paint composition is selected. In selecting the candidate paint composition, the most reasonable one can be appropriately selected by considering the color with the reference color, the degree of matching between the HG value and the HB value, the composition data, and the like. This selection method is not particularly limited. It is preferable that the candidate paint composition is selected, for example, from those in which the color difference from the reference color and the degree of matching between the HG value and the HB value are within a certain range.
[0035]
In this step, the color data and the micro glitter data of at least one paint composition having the same color number as the reference color are selected from the color numbers registered in advance in the computer, and the selected paint composition is selected. , And the HG value / HB value of the reference color, and the index of the degree of matching between the color of the selected paint composition and the HG value / HB value is calculated. A method of selecting a combination may be adopted.
[0036]
Step (4):
In this step, the color matching calculation logic is operated to correct the candidate paint composition selected in step (3).
[0037]
In this step, the paint blending is performed using a computer in which a plurality of paint blends, color data and micro glitter data corresponding to each paint blend, and color property data and micro glitter property data of a plurality of primary color paints are registered. And operating the color matching calculation logic utilizing the respective data to correct the candidate paint composition selected in the step (3) to obtain a corrected composition closer to the reference color.
[0038]
According to the present invention, it is possible to perform the toning work of the glitter paint in accordance with the candidate mixture selected by the above-described approximate color search system. The toning method of the present invention may include a step of transmitting the candidate paint composition obtained in the above step (3) or the correction composition obtained in the step (4) to an electronic balance.
[0039]
The transfer of the composition to the electronic balance can be performed using a telephone line, an optical cable, or the like. Based on this transferred formulation, a toning coating can be formulated using an electronic balance. By applying the toning paint to prepare a toning progress coated plate, it can be determined whether or not this paint passes. In this determination, it is determined whether or not the difference between the color data of the toned coating plate obtained by the colorimeter and the color data of the reference color, for example, ΔE * in the L * a * b * color system is within an allowable range. At the same time, it is visually determined whether or not the glitter is within an allowable range. If unsuccessful, the corrected blending can be obtained again by operating the color matching calculation logic based on the blending of the toning paint, the color data of the toned coating plate and the HG value / HB value.
[0040]
【Example】
Hereinafter, the present invention will be described more specifically with reference to examples. The present invention is not limited to the embodiments.
[0041]
Example 1
In repairing the silver metallic A color coating surface, the paint color around the repaired part is used as a reference color, and this reference color is specularly reflected by a multi-angle colorimeter "Van-VanFA sensor" manufactured by Kansai Paint Co., Ltd. The color measurement was performed under three angle conditions where the angle between the axis and the light receiving axis was 25 degrees, 45 degrees, and 75 degrees. The colorimetric values were as shown in Table 1 below.
[0042]
[Table 1]
Figure 2004093522
[0043]
Regarding the glitter, using a glitter sample color chart collection for paint toning having a glitter level of 6 and a brightness level of 5 as shown in FIG. 2, a paint layer having a lightness L90 similar to the paint color around the repaired portion is used. A glitter sample color chart for color was selected, and the glitter of the toning target was visually compared to select a sample L90-e having an approximate level. The HG value of this sample color chart L90-e is 59.9, and the HB value is 39.1.
[0044]
Using the colorimetric value of the silver metallic color obtained above and the HG value and HB value of the selected sample paint color as initial values of glitter information, a computer color matching toning device “Van-VanFA” manufactured by Kansai Paint Co., Ltd. Station ".
[0045]
Here, the “Van-VanFA station” is a computer in which the color characteristic data and the micro-brightness characteristic data of a plurality of primary color paints are registered, and the color matching calculation logic using the respective paint formulations and the respective data is operated. Used as
[0046]
In the above-mentioned toning device, the degree of matching with pre-registered data is checked, and candidate paint formulations are ranked from the first to the fifth in the database in ascending order of the consistency index (the order of the sum of the deviation widths of each data is smaller). I chose the order. When the paint color of each candidate paint formulation and the reference color were compared visually, it had good color consistency in the order of the candidates. Using this first-ranking composition as a starting composition, a toned progress coated plate was prepared, and a toning operation was performed.
[0047]
On the other hand, only the colorimetric value of the silver metallic color is input to the toning device, and the degree of matching with the previously registered data is checked in the same manner as described above, and the order of smaller matching index (the deviation width of each data) is determined. Are selected from the database from the first to the fifth in the order of the smallest sum of the candidate paints. In the visual judgment, the glitter of the paint colors of the second and fifth candidate paints is higher than the glitter of the reference color. It was slightly stronger. This is because only the color characteristic data is matched, so that a paint color that is selected from candidate colors having similar colors and has a different brilliancy even if the colors are matched is searched.
[0048]
According to the embodiment of the present invention, by inputting the HG value and the HB value using a simple sample color chart, it is possible to avoid that paint colors having different glittering feelings are selected at the top of the candidate paint formulation. Is possible.
[0049]
【The invention's effect】
According to the glitter sample color chart for paint toning of the present invention, the glitter of the paint color can be easily determined without using an expensive micro glitter measuring instrument, and the micro glitter information can be calculated by computer. It is possible to perform toning work with high accuracy by incorporating it into a color system.
[Brief description of the drawings]
FIG. 1 is an example in which measured values of HG and HB of an actual paint color of an automobile are mapped at the same brightness.
FIG. 2 is a view showing a preferred embodiment of a glitter sample color chart for paint toning according to the present invention.

Claims (7)

同一明度塗色で、複数水準の光輝感を有する各塗色見本を段階的に並べて配置してなることを特徴とする塗料調色用光輝感見本色票。A glitter sample color chart for paint toning, characterized in that paint color samples having the same lightness paint color and having a plurality of levels of glitter are arranged side by side. 複数水準の明度塗色において、夫々、複数水準の光輝感を有する各塗色見本を段階的に並べて配置してなる塗料調色用光輝感見本色票集。A collection of glitter sample color charts for paint toning in which paint color samples having a plurality of levels of glitter are arranged in stages in a plurality of brightness paint colors. 隣接する水準が、人間の目視による識別限界に応じて選択される請求項1又は2記載の塗料調色用光輝感見本色票。The glitter sample color chart for paint toning according to claim 1 or 2, wherein the adjacent levels are selected according to a human visual recognition limit. 光輝感が、ミクロ光輝感の測定値によって分類される請求項1又は2の塗料調色用光輝感見本色票。The glitter sample color chart for paint toning according to claim 1 or 2, wherein the glitter is classified according to a measured value of micro glitter. ミクロ光輝感の測定値が、光学的測定機によって測定されたハイライトの粒子感(HG)及びハイライトのキラキラ感(HB)の測定値である請求項4の塗料調色用光輝感見本色票。The glitter sample color for paint toning according to claim 4, wherein the measured value of the micro glitter is a measured value of the graininess (HG) of the highlight and the glitter (HB) of the highlight measured by an optical measuring instrument. Votes. (1)請求項1ないし5のいずれか1項に記載の塗料調色用光輝感見本色票集を用いて、調色対象塗膜の光輝感を目視で比較して近似水準の見本を選択し、該見本の光輝感情報を得る工程、(2)調色対象塗膜の色データを得る工程、及び(3)前工程で得た光輝感情報と色データを基に、予めコンピュータに登録されたデータベースの中から候補塗料配合を選び出す工程を含む近似色検索システム。(1) Using the glitter sample color chart collection for paint toning according to any one of claims 1 to 5, visually compare the glitter of the coating film to be toned and select a sample of an approximate level. A step of obtaining the glitter information of the sample, a step of (2) a step of obtaining color data of the coating film to be subjected to toning, and a step of (3) previously registering in the computer based on the glitter information and the color data obtained in the previous step. Approximate color search system that includes the step of selecting candidate paint formulations from the database created. 請求項6に記載の近似色検索システムによって選択された候補配合に従って調色作業をしてなる光輝塗料の調色方法。A toning method for a brilliant paint, wherein a toning operation is performed according to a candidate mixture selected by the approximate color search system according to claim 6.
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Cited By (4)

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JP2010509595A (en) * 2006-11-10 2010-03-25 ピーピージー インダストリーズ オハイオ インコーポレーテツド Color tools and methods for color matching
WO2011001477A1 (en) * 2009-07-03 2011-01-06 株式会社南海 Glitter color sample sheet and book of glitter color samples
CN109682477A (en) * 2019-02-21 2019-04-26 昆山吉奥诗色卡有限公司 A kind of aqueous colour atla
EP2283332B1 (en) 2008-05-28 2020-12-09 Akzo Nobel Coatings International B.V. Method for determination of a matching colour variant

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010509595A (en) * 2006-11-10 2010-03-25 ピーピージー インダストリーズ オハイオ インコーポレーテツド Color tools and methods for color matching
EP2283332B1 (en) 2008-05-28 2020-12-09 Akzo Nobel Coatings International B.V. Method for determination of a matching colour variant
WO2011001477A1 (en) * 2009-07-03 2011-01-06 株式会社南海 Glitter color sample sheet and book of glitter color samples
JP5025735B2 (en) * 2009-07-03 2012-09-12 株式会社南海 Bright color sample slip and bright color sample book
CN109682477A (en) * 2019-02-21 2019-04-26 昆山吉奥诗色卡有限公司 A kind of aqueous colour atla

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