| 摘要 |
<p>1357934 Preferential dyeing of polyamides CROMPTON & KNOWLES CORP 11 Oct 1971 [12 Oct 1970] 47277/71 Heading D1B The dyestuffs of the general formula: wherein M is H, Na, K or NH 4 are R is H, C1, NO 2 or CH 3 are used in the preferential dyeing of polyamide yarn or textile material, the bath being neutral to mildly alkaline so that the more receptive component is preferentially dyed.</p> |
