| 摘要 |
A process for level (even) colouring or optical brightening and post-sizing of beater-presized paper webs using polyglycol ethers, polyglycol esters or polyglycol amides of the general formula (definition may be found in claim 1) <IMAGE> with the addition being effected before, during or after paper web formation, but upstream of the first dryer section in the papermaking machine.
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