在染色过程中，上染到纤维上的染料量与最初染浴中染料总量之比，常以百分数表示。染色结束时的上染率称为竭染率（degree of exhaustion）。
采用酸浴染色不但可使这些染钭上染，而且上染率很高。
In an acid-bath, however, not only this kind of dyes can be used . for dyeing silk fibre, but quite high exhaustion rates can be achieved.
棉织物经改性后染色，上染率和固色率提高很多，但透染性不佳。
The dyeing and fixation percentage of modified cotton fabric was enhanced greatly, but its permeability was poor.
为了是上染率最高，实验室需要判定如何调整生产过程中的关键参数。
The laboratory needs to determine how the key process parameters have to be adjusted in order to maximise dye exhaustion.
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