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できるだけきれいに
  →CMYK
レタッチャー・ライター・印刷ディレクター
村上良日
@yamo74
www.iwashi.org
・CMYK変換設定の内容
・プロファイル埋める?
プロファイルとは
マッチング方法とは
RGBと同じようにCMYKにも
プロファイルを埋め込むの?
おしながき
Photoshop・ふたつのCMYK変換方法
モード変換の内容、カラー設定
「編集」メニューのプロファイル変換
モード変換
アプリケーションデフォルト
カラー設定の内容で変換する
InDesignやIllustratorと同期できる
カラーパレット他の数値に影響
プロファイル変換
画像ごとに設定
マッチング方法を
画像に合わせて使い分けられる
!
(「色の校正」と連動する)
ふたつの違いは?
変換設定のキモはふたつ
① プロファイルの選択
② マッチング方法の選択
① プロファイルとは?
マゼンタ色
指定値
表現色
いろいろ
M100%
指定値
(カラー値)
表現色
(カラーアピアランス)
プロファイルで
値と色を繋げる
Japan Color 2001 Coated
• 日本の印刷会社の平均値
• かつ、目標値
• Photoshopデフォルト
• Adobeデフォルト
Japan Color 2011 Coatedもあるよ!
普通のオフセットなら
② マッチング方法とは?
ガモット図(色域図)
あるカタチ  の色域を、
別のカタチ の色域に、
どうやって収めるかを
指定する。
はみ出た部分を
どうするか?
マッチング方法とは
普段づかいは、ふたつだけ
知覚的 相対的
知覚的 相対的
色のグラデは
きちんと残る
全体に彩度が
落ちる
色域内は再現
色域外は破綻
グラデに段差
知覚的
相対的
コンパクトデジカメ等は
「相対的」でOK
デジタル一眼・イラスト他は
両方試す
ざっくりした使い分け方
CMYKプロファイル
埋める?埋めない?
埋めると色が変わる!とか
ウチは必ず埋めてくれ!とか
M100%
指定値
(カラー値)
表現色
(カラーアピアランス)
プロファイルで
値と色を繋げる
M100%
指定値
(カラー値)
表現色
(カラーアピアランス)
変換したプロファイル、または
アプリケーションデフォルト
(InDesign/Illustrator)
カラー値
同じ紐付けのワークフロー
カラーアピアランス
カラー値
紐付けが狂ったワークフロー
カラーアピアランス
埋める・埋めないは問題じゃない
正しい知識と
一貫した紐付けが重要
工程の一貫性を保てない場合
3/27発売
+DESIGNING vol.36
特集「色を極める!」
付録:HSBチャート冊子
やもめも
Photoshop/印刷/ルーペ
www.iwashi.org
NOW
PRINTING...

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バンフーセミナー vol.154 / 10分でCMYK変換設定のキモ