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
GB1540222A
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.)
KENNETH ROY WOOD
Original Assignee
KENNETH ROY WOOD
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 KENNETH ROY WOODfiledCriticalKENNETH ROY WOOD
Priority to GB1540222ApriorityCriticalpatent/GB202757A/en
Publication of GB202757ApublicationCriticalpatent/GB202757A/en
In the vat dyeing of animal fibres, such as wool and silk, or materials containing them, by the caustic soda sodium hydrosulphite process, to prevent the deleterious action on the fibres of the caustic alkali, lactic acid is added to the dye-bath. In examples, woollen yarn is dyed with Caledon Yellow G (flavanthrone) and wool with Caledon Red BN (anthraquinone naphthacridone).
GB1540222A1922-06-011922-06-01Improved treatment of animal fibres or animal and vegetable fibres in the application of vat dyes
ExpiredGB202757A
(en)