アルミニウム陽極酸化皮膜の着色

第1報 皮膜用染料の合成と着色

抄録

The anodic oxide coatings of aluminium, which had been formed in sulphuric acid, was coloured by means of mono-azo dyes prepared by coupling of R-acid with several derivatives of aniline.
Examinations were performed on the colours produced and their fastness to light and rate of absorption.
The following results were obtained:
(1) The absorption of the dyes by anodized aluminium in acidic dye bath was superior to that in alkaline dye bath.
(2) The synthetic dyes, containing mono-radicals of Cl, SO₃Na, NO₂, COOH, and CH₃ gave orange colour on the coatings. While, p-derivatives gave reddish and o- and m- derivatives gave yellowish colour. In other synthetic dyes containing OH mono-radicals, the colours given by means of o-, m-, and p- derivatives.