浙江龙盛：染料主要产品分散黑报价近期累计上涨5000元/吨

Group 1 - The core point of the article is that Zhejiang Longsheng has announced a price increase for certain varieties of disperse dyes due to rising prices of reducing agents, with the main product disperse black seeing a cumulative increase of 5000 yuan per ton [1] - The sustainability of these price increases will depend on the supply and demand dynamics in the market [1]