= -- Diamine blacks find a very extensive application for dyeing blacks on satin, either dyed direct in one bath, or dyed, diazotised and developed. ❋ Franklin Beech (N/A)
On the other hand, the cotton can be prepared with the phenol and the colour developed by passing into a bath of the diazotised base, and practice has shown that this latter proceeding is the best. ❋ Franklin Beech (N/A)
The process of dyeing cotton with a naphthol colour takes place in two stages, the first being the grounding or preparing with the naphthol, the second the developing with the diazotised base. ❋ Franklin Beech (N/A)
Azophor red P N is also a preparation of diazotised paranitroaniline in the form of a dry powder which keeps well. ❋ Franklin Beech (N/A)
These two operations should follow each other as quickly as possible, also care has to be taken that the diazotised goods are not exposed to direct sunlight or heat, which causes unlevel dyeings. ❋ Franklin Beech (N/A)
They may even be diazotised and developed with beta-naphthol and phenylene diamine. ❋ Franklin Beech (N/A)
Nitrazol C is a ready prepared diazotised paranitroaniline in a powder form which keeps well if stored in a dry place. ❋ Franklin Beech (N/A)
After dyeing rinse well in a bath containing 6 dr. soda and 3 oz. soap per 10 gallons water, diazotised in a fresh bath with 4 lb. nitrite of soda and 12 lb. hydrochloric acid (per 100 lb. of dry goods), rinse thoroughly and develop with 3 to 16 oz. phenylene diamine (93 per cent.), with addition of 1 to 2 lb. soda. ❋ Franklin Beech (N/A)
When paranitroaniline is used as the source for the coupling bath it is well to prepare a stock bath of diazotised paranitroaniline, which may be done in the following manner: -- ❋ Franklin Beech (N/A)
They can be diazotised at the ordinary temperature, and their diazo compounds are much stabler than those, for example, of alpha-and beta-naphthylamine or of aniline, which must always be used as quickly as possible. ❋ Franklin Beech (N/A)
Practically in the "coupling process" of dyeing only diazotised paranitroaniline is used as the coupler, although other amido bases of a similar nature are available. ❋ Franklin Beech (N/A)
If greater fastness is required, and more especially if it is a case of replacing aniline black, Diaminogene diazotised and developed is a good dye-stuff. ❋ Franklin Beech (N/A)
The most suitable black dye for this purpose is Diamine black B H, diazotised and developed. ❋ Franklin Beech (N/A)
Glauber's salt, then diazotised and develop with phenylene diamine. ❋ Franklin Beech (N/A)
Nitrosamine, etc., there has been offered to dyers preparations of diazotised paranitroaniline in the form of a powder or paste, readily soluble in water, that will keep in a cool and dry place for any reasonable length of time. ❋ Franklin Beech (N/A)
By reduction with ammonium sulphide the O. NO. {2} groups were entirely removed as in the case of the cellulose nitrates; the NO. {2} was reduced to NH_ {2} and there resulted a cellulose amidobenzoate, which was diazotised and combined with amines and phenols to form yellow and red colouring matters, the reacting residue remaining more or less firmly combined with the cellulose. ❋ C. F. Cross (N/A)
