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.)
Expired
Application number
GB35906/31A
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.)
BASF Schweiz AG
Original Assignee
Gesellschaft fuer Chemische Industrie in Basel CIBA
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 Gesellschaft fuer Chemische Industrie in Basel CIBAfiledCriticalGesellschaft fuer Chemische Industrie in Basel CIBA
Publication of GB379948ApublicationCriticalpatent/GB379948A/en
Vat dyes, dyeing with.--In the process of dyeing dense vegetable materials by impregnating with a finely divided vat dye in the unvatted state and treating the impregnated material successively with a reducing agent and an oxidizing agent, the impregnation is improved by the addition of an alkylated, aralkylated or cycloalkylated aromatic sulphonic acid or a salt thereof to the impregnating bath. In an example, a fabric is impregnated with Cibanone blue 3 G in a bath to which sodium dibutylnaphthalene sulphonate has been added, and the impregnated fabric is treated in a bath containing alkali and hydrosulphite, and oxidized and finished in the usual manner. Specifications 22331/05, [Class 15, Bleaching &c.], 242,233, and 305,230, [both in Class 15 (ii), Dyeing, Processes &c. for], are referred to. p
GB35906/31A1930-12-301931-12-29Improvements in dyeing with vat-dyestuffs
ExpiredGB379948A
(en)